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A survey of panel aeroelasticity in shock-dominated flow:Perspectives from fluid-structure interactions and shock wave-boundary layer interactions 认领 引用 被引量：1
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作者 Aiming SHI Yiwen HE 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第1期210-229,共20页
As a multidisciplinary phenomenon,panel aeroelasticity in shock-dominated flow is featured by two primary interactions:Fluid-Structure Interactions(FSIs)and Shock-Boundary Layer Interactions(SBLIs).The former raises s... As a multidisciplinary phenomenon,panel aeroelasticity in shock-dominated flow is featured by two primary interactions:Fluid-Structure Interactions(FSIs)and Shock-Boundary Layer Interactions(SBLIs).The former raises structural concerns,and the latter is of aerodynamic interest.Thus,panel aeroelasticity in shock-dominated flow represents a vital topic for the development and optimization of supersonic vehicles and propulsion systems.This review systematically summarizes recent advances in the methodologies applied to capture structural and fluid dynamics,including theoretical models,numerical simulations,and wind tunnel experiments.The application of data-driven modal decomposition,an advanced technique to extract physically crucial features,on the topic is introduced.From the perspective of FSIs,the distinctive aeroelastic behaviors in shock-dominated flow,including hysteresis phenomena and nonlinear responses,are highlighted.From the perspective of SBLIs,the modifications in their spatial and temporal characteristics imposed by the aeroelastic responses are emphasized.Motivated by the interaction between the shock waves and structural response,different strategies have been proposed to implement aeroelastic suppression and shock control,which have the potential to enhance structural safety and aerodynamic performance in the next generation of high-speed flight vehicles. 展开更多
关键词 Aeroelasticity Fluid structure interaction Modal decomposition Shock boundary layer interactions Shock waves
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Numerical Study on the Wave Loads of the Semi-Submersible Structure Exerted by a Solitary Wave 认领 引用
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作者 LIN Jin-bo LIU Yang +2 位作者 ZHOU Zhong-bing MAO Hong-fei WU Guang-lin 《China Ocean Engineering》 SCIE EI CSCD 2026年第3期713-723,共11页
Wave loads are a critical factor influencing the safety of semi-submersible offshore platforms(SSOPs).However,research on wave loads acting on semi-submerged structures remains limited due to complex large-amplitude m... Wave loads are a critical factor influencing the safety of semi-submersible offshore platforms(SSOPs).However,research on wave loads acting on semi-submerged structures remains limited due to complex large-amplitude motions,such as green water and wave breaking.To investigate the wave loads on an SSOP induced by a solitary wave,a meshless numerical model is developed by integrating the smoothed particle hydrodynamics(SPH)method,artificial viscosity,and Rayleigh theory.The model’s accuracy is validated by comparing simulated wave heights and wave loads against experimental data and exact analytical solutions.The maximum absolute error in the wave height peak is 0.037,corresponding to a relative error of 7.4%,while the maximum relative error in wave loads is 54%(absolute error:0.37 N).Although the relative error in the wave loads appears large,primarily due to the small magnitude of the measured loads,the numerical results remain in good agreement with both the experimental data and the exact solutions.Flow velocities around the structure increase with higher wave heights,exceeding 2 m/s when wave heights surpass 0.2 m,owing to complex wave dynamics.Distinct vortices form both upstream and downstream of the structure,intensifying with increasing wave height.The peak magnitudes of horizontal forces(both positive and negative)decrease with greater water depth,whereas vertical forces increase.Notably,the wave load amplitude(WLA)in the z-direction significantly exceeds that in the x-direction,reaching a maximum value of 0.799. 展开更多
关键词 wave-structure interaction semi-submersible structures extreme waves wave loads
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Designing“Sphere/Network”Hierarchical Dielectric Loss Structure for Efficient Electromagnetic Wave Absorption 认领 引用
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作者 Yue Zhang Xin Yang +7 位作者 Yongwen Yang DingYuan Ma Wenjian Wang Qing Pang Changyi Zheng Weiping Ye Rui Zhao Weidong Xue 《Rare Metals》 SCIE EI CAS CSCD 2026年第6期360-370,共11页
Electromagnetic wave absorption materials require high dielectric loss and excellent impedance matching performance.However,current conventional biomass‐derived electromagnetic wave absorption materials are still lim... Electromagnetic wave absorption materials require high dielectric loss and excellent impedance matching performance.However,current conventional biomass‐derived electromagnetic wave absorption materials are still limited by low electrical conductivity and a single structure.In this work,a“sphereetwork”hierarchical attenuation electromagnetic wave absorption material,which combines weakly conductive biomass‐derived carbon spheres and highly conductive cantaloupe‐like textured polypyrrole,was synthesized using Fe3+and methyl orange as template‐directing agents.Under the guiding effect of methyl orange,polypyrrole does not undergo disordered agglomeration on the surface of carbon spheres;instead,tubular polypyrrole grows orderly along the sphere surface and assembles to form a continuous conductive network.Conduction loss,dipole polarization,and interfacial polarization loss-acting as cooperative loss mechanisms-enable OJ‐MO‐PPy‐2.5 to achieve broadband effective absorption,with an effective absorption bandwidth of 7.2 GHz and a minimum reflection loss of−48.82 dB.Meanwhile,computer simulation technology(CST)simulation results indicate that after coating OJ‐MO‐PPy‐2.5,the reflection intensity of the electromagnetic wave is reduced by approximately three times when the wave is incident normally.The successful fabrication of OJ‐MO‐PPy furnishes novel insights for biomass‐derived electromagnetic wave absorption materials with broadband absorption capabilities. 展开更多
关键词 biomass‐derived carbon dielectric loss electromagnetic wave absorption hierarchical structure polypyrrole
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Experimental study on real-time monitoring of surrounding rock 3D wave velocity structure and failure zone in deep tunnels 认领 引用
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作者 Hongyun Yang Chuandong Jiang +4 位作者 Yong Li Zhi Lin Xiang Wang Yifei Wu Wanlin Feng 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2026年第2期423-437,共15页
An innovative real-time monitoring method for surrounding rock damage based on microseismic time-lapse double-difference tomography is proposed for delayed dynamic damage identification and insufficient detection of a... An innovative real-time monitoring method for surrounding rock damage based on microseismic time-lapse double-difference tomography is proposed for delayed dynamic damage identification and insufficient detection of adverse geological conditions in deep-buried tunnel construction.The installation techniques for microseismic sensors were optimized by mounting sensors at bolt ends which significantly improves signal-to-noise ratio(SNR)and anti-interference capability compared to conventional borehole placement.Subsequently,a 3D wave velocity evolution model that incorporates construction-induced disturbances was established,enabling the first visualization of spatiotemporal variations in surrounding rock wave velocity.It finds significant wave velocity reduction near the tunnel face,with roof and floor damage zones extending 40–50 m;wave velocities approaching undisturbed levels at 15 m ahead of the working face and on the laterally undisturbed side;pronounced spatial asymmetry in wave velocity distribution—values on the left side exceed those on the right,with a clear stress concentration or transition zone located 10–15 m;and systematically lower velocities behind the face than in front,indicating asymmetric rock damage development.These results provide essential theoretical support and practical guidance for optimizing dynamic construction strategies,enabling real-time adjustment of support parameters,and establishing safety early warning systems in deep-buried tunnel engineering. 展开更多
关键词 Deep-buried tunnel Microseismic monitoring Wave velocity tomography Surrounding rock damage zone Real-time monitoring
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An Arbitrary Lagrangian-Eulerian(ALE)Finite Element Potential Flow Solver for Fully Nonlinear Free Surface Flows and Wave-Structure Interactions in the Time Domain 认领 引用
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作者 SONG Zhi-wei ZHU Pei-qiao +4 位作者 ZHU Jun-jie GAO Jun-liang LIU Ying-yi CHEN Da XIE Ming-xiao 《China Ocean Engineering》 SCIE EI CSCD 2026年第2期341-356,共16页
A fully nonlinear potential flow(FNPF)solver has been developed using the Finite Element Method(FEM)to simulate time-domain interactions between free-surface waves and marine structures.The ALE framework is implemente... A fully nonlinear potential flow(FNPF)solver has been developed using the Finite Element Method(FEM)to simulate time-domain interactions between free-surface waves and marine structures.The ALE framework is implemented alongside a segment spring analogy-based moving mesh strategy to accurately track evolving free surfaces and moving boundaries of floating bodies.The solver employs a preconditioned conjugate gradient method to efficiently resolve the resulting sparse,symmetric linear system at each time step.Temporal evolution is managed through a standard fourth-order Runge-Kutta scheme,while Chebyshev 5-point smoothing suppresses non-physical saw-tooth instabilities.The solver’s performance and reliability are verified through comprehensive benchmark tests,including freesurface sloshing,nonlinear wave propagation,and wave-structure interactions with submerged or floating bodies.Furthermore,the study explores a modified potential flow model incorporating a quadratic damping term to address viscous effects in gap/moonpool resonance problems. 展开更多
关键词 fully nonlinear water waves finite element method ALE potential flow theory
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Coral-Like Yolk-Shell-Structured CoNi@Void@C Microspheres for Enhanced Microwave Absorption,Photothermal,Anti-Corrosion,and Radiation Shielding Properties 认领 引用
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作者 Jiale Wu Kaizhao Wang +6 位作者 Kaijun Wang Hyeona Park Jangyeon Hwang Junkai Li Yafei Wang Jin Hu Shizhao Xiong 《Rare Metals》 SCIE EI CAS CSCD 2026年第2期887-903,共17页
Considering the multiple challenges faced by stealth coatings in complex service environments,the development of multifunctional integrated microwave absorbing materials (MAMs) that combine efficient electromagnetic (... Considering the multiple challenges faced by stealth coatings in complex service environments,the development of multifunctional integrated microwave absorbing materials (MAMs) that combine efficient electromagnetic (EM) attenuation with environmental tolerance has become an urgent need.In this work,coral-like CoNi@Void@C microparticle (MP) with the yolk-shell structure was synthesized through a continuous process combining conventional solvothermal,sol-gel,oxidative self-polymerization,and acid etching.The precise construction of the magnetic core-cavity-carbon shell structure synergistically optimizes impedance matching and multiple loss mechanisms,endowing the material with outstanding microwave dissipation performance.A minimum reflection loss (RLmin) of -81.24 dB and an effective absorption bandwidth (EAB) of 6.21 GHz are achieved at an ultra-thin matching thickness (dm),and the excellent EM stealth capability is confirmed by a radar cross-section value of 51.82 dB m2.Additionally,the barrier effect of the cavity buffer layer and nonpolar carbon shell simultaneously endow it with low density,super-hydrophobicity,efficient photothermal conversion,corrosion resistance,and performance reinforcement for ionizing radiation shielding,demonstrating potential adaptability in various environments.This work provides a new paradigm for the next generation of environmentally adaptive MAMs through a three-level synergistic strategy of“morphology-cavity-interface”. 展开更多
关键词 CoNi@Void@C microwave absorption multifunctional integration photothermal and anti-corrosion yolk-shell structure
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Vertical Structure and Energy Transfer of Stationary Planetary Waves in Different Prescribed Atmospheric Stratifications 认领 引用
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作者 Wenqi ZHANG Lin WANG 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2026年第1期233-246,共14页
This study investigates the relationship between atmospheric stratification (i.e., static stability given by N2) and the vertical energy transfer of stationary planetary waves, and further illustrates the underlyin... This study investigates the relationship between atmospheric stratification (i.e., static stability given by N2) and the vertical energy transfer of stationary planetary waves, and further illustrates the underlying physical mechanism. Specifically, for the simplified case of constant stratospheric N2, the refractive index square of planetary waves has a theoretical tendency to increase first and then decrease with an increased N2, whereas the group velocity weakens. Mechanistically, this behavior can be understood as an intensified suppression of vertical isentropic surface displacement caused by meridional heat transport of planetary waves under strong N2 conditions. Observational analysis corroborates this finding, demonstrating a reduction in the vertical-propagation velocity of waves with increased N2. A linear, quasi- geostrophic, mid-latitude beta-plane model with a constant background westerly wind and a prescribed N2 applicable to the stratosphere is used to obtain analytic solutions. In this model, the planetary waves are initiated by steady energy influx from the lower boundary. The analysis indicates that under strong N2 conditions, the amplitude of planetary waves can be sufficiently increased by the effective energy convergence due to the slowing vertical energy transfer, resulting in a streamfunction response in this model that contains more energy. For N2 with a quasi-linear vertical variation, the results bear a resemblance to the constant case, except that the wave amplitude and oscillating frequency show some vertical variations. 展开更多
关键词 planetary waves vertical propagation atmospheric stratification stratospheric circulation group velocity
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Shock wave propagation of nest-like structures under axial impact 认领 引用
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作者 Chang Liu Qing Peng +1 位作者 Yueguang Wei Xiaoming Liu 《Theoretical & Applied Mechanics Letters》 EI CAS CSCD 2026年第3期1-7,共7页
Inspired by natural bird nests,nest-like structures consist of randomly packed slender particles confined within a container.This study investigates the dynamic behavior of nest-like structures by finite element simul... Inspired by natural bird nests,nest-like structures consist of randomly packed slender particles confined within a container.This study investigates the dynamic behavior of nest-like structures by finite element simulation and a shock model.Under dynamic impact conditions,the nest-like structures exhibit distinct mechanisms compared to quasistatic loading.A confined deformation zone with nearly uniform stress forms near the loading end.This zone propagates steadily into the undeformed region at a constant velocity.Notably,the expansion speed exceeds the loading rate but remains significantly slower than the stress wave speed in solid material.We proposed a rigid-perfectly plastic-locking shock model to quantitatively establish how initial conditions govern two critical dynamic responses:the stress in the confined zone and the expansion velocity of the confined zone.These dynamic characteristics of nest-like structures demonstrate their potential for impact resistance. 展开更多
关键词 Nest-like structure Dynamic behavior Shock model Finite element model Impact resistance
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Facile construction of VS2@GNSs composites with 1D/2D hierarchical structures for efficient electromagnetic wave absorption 认领 引用
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作者 Jia Zhao Jiahuan Liu +2 位作者 Yongqiang Guo Yueqi Yu Junwei Gu 《Science China Materials》 SCIE EI CAS CSCD 2026年第8期4912-4923,共12页
With the extensive production of current multifarious electronic devices,corresponding electromagnetic pollution issues have been increasingly exacerbated.In response to these challenges,herein,VS2 nanorods were un... With the extensive production of current multifarious electronic devices,corresponding electromagnetic pollution issues have been increasingly exacerbated.In response to these challenges,herein,VS2 nanorods were uniformly grafted on graphene nanosheets(GNSs)fabricated through a facile ball milling method to construct 1D/2D hierarchical VS2@GNSs composites with terrific electromagnetic wave(EMW)absorption properties.Specifically,the minimal reflection loss(RLmin)of VS2@GNSs composites could reach-49.83 dB at 1.83 mm,and an ultra-broad effective absorption bandwidth(EAB)of 6.72 GHz was attained when the matching thickness was 1.96 mm,attributable to the distinguished impedance matching characteristics and EMW attenuation capacities of 1D/2D VS2@GNSs composites.In addition,computer simulation technology(CST)full-wave simulation further confirmed VS2@GNSs composites manifested remarkable radar scattering cross-section(RCs)suppression in real-world application scenarios,with the RCS reduction value of up to 20.38 dB m2compared to metallic substrate.This work proposed the theoretical instruction and experimental basis for the design and fabrication of highperformance stealth materials. 展开更多
关键词 VS2@GNSs composites 1D/2D hierarchical structure EMW absorption CST simulation
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Gyroid-structured SiOC composite with excellent broadband microwave absorption and load-bearing performance 认领 引用
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作者 Hanjun Wei Siyu Chen +5 位作者 Zhiyong Chen Lu Tang Jimei Xue Cunxian Wang Zhijun Wang Ying Li 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第1期277-288,共12页
Designing materials with both structural load-bearing capacity and broadband electromagnetic(EM)wave absorption properties remains a significant challenge.In this work,SiOC/SiC/SiO2composite with gyroid structures ... Designing materials with both structural load-bearing capacity and broadband electromagnetic(EM)wave absorption properties remains a significant challenge.In this work,SiOC/SiC/SiO2composite with gyroid structures were prepared through digital light processing(DLP)3D printing,polymer-derived ceramics(PDCs),chemical vapor infiltration(CVI),and oxidation technologies.The incorporation of the CVISiC phase effectively increases the dissipation capability,while the synergistic interaction between the gyroid structure and SiO2phase significantly improves impedance matching performance.The SiOC/SiC/SiO2composite achieved a minimum reflection loss(RL min)of-62.2 d B at 4.3 mm,and the effective absorption bandwidth(EAB)covered the X-band,with a thickness range of 4.1 mm-4.65 mm.The CST simulation results explain the broadband and low-frequency absorption characteristics,with an EAB of 8.4 GHz(9.6-18 GHz)and an RL min of-21.5 dB at 5 GHz.The excellent EM wave attenuation performance is associated primarily with polarization loss,conduction loss,the gyroid structure's enhancement of multiple reflections and scattering of EM waves,and the resonance effect between the structural units.The SiOC/SiC/SiO2composite also demonstrated strong mechanical properties,with a maximum compressive failure strength of 31.6 MPa in the height direction.This work opens novel prospects for the development of multifunctional structural wave-absorbing materials suitable for broadband microwave absorption and load-bearing properties. 展开更多
关键词 Digital light processing Gyroid structure SiOC/SiC/SiO2composite Microwave absorption Load-bearing properties
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Lattice expansion/contraction triggered by etching-assisted strain engineering of cobalt sulfide heterostructures to boost electromagnetic wave absorption 认领 引用 被引量：2
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作者 Zhuolin Liu Jiaolong Liu +9 位作者 Hui bian Xuejiao Zhou Hongsheng Liang Junkai Ren Peijun Zhang Dan Qu Fengxia Li Siyu Zhang Bing Wei Hongjing Wu 《Advanced Powder Materials》 EI CAS CSCD 2026年第2期1-13,共13页
Lattice-level design presents a promising avenue to overcome the bottleneck of achieving a broadband dielectric response in transition metal chalcogenides.However,the selective control of lattice characteristics(expan... Lattice-level design presents a promising avenue to overcome the bottleneck of achieving a broadband dielectric response in transition metal chalcogenides.However,the selective control of lattice characteristics(expansion or contraction)in multiphase systems remains challenging,and their specific effects on electromagnetic modulation are poorly understood.Herein,we propose an etching-assisted strain engineering strategy to deliberately trigger lattice distortions and regulate lattice expansion and contraction in cobalt sulfide heterostructures.We demonstrate that the sequence of processing steps is critical:an etching-first-sulfurization-later approach(Route 1)preferentially induces tensile strain and lattice expansion,whereas a sulfurization-first-etching-later(Route 2)pathway favors compressive strain and lattice contraction.Compared to the strain-free cobalt sulfide(C-0),the optimal sample(C-24)achieves a comparable coexistence of local lattice expansion and contraction via Route 1.This coexistence expedites localized lattice perturbations,enriches lattice distortion-related sulfur vacancies,and intensifies multiphase heterointerfaces,collectively boosting the dielectric polarization response.Consequently,this elaborate strategy enables an effective absorption bandwidth of 5.45 GHz with excellent polarization behavior,which are 1.83-fold and 1.93-fold improvement over C-0,respectively.This work provides a novel strategy for manipulating polarization response at the lattice level,offering valuable insights for the rational design of advanced heterogeneous absorbents based on lattice strain engineering. 展开更多
关键词 Lattice expansion/contraction Sulfides Heterointerfaces Dielectric polarization Electromagnetic wave absorption
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A novel fabrication approach for high-aspect-ratio slow wave structures combining water film-assisted laser pre-channeling and micro-milling 认领 引用
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作者 Xueqiang WU Zhentong MA +5 位作者 Yu WANG Xiguang LI Chang LIU Mingjun CHEN Qi LIU Chunya WU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第4期714-727,共14页
The Slow Wave Structure(SWS),typically fabricated from particle-reinforced composite material,such as Dispersed Oxygen-Free Copper(DOFC),is a core component of terahertz travelling wave tubes.However,machining these h... The Slow Wave Structure(SWS),typically fabricated from particle-reinforced composite material,such as Dispersed Oxygen-Free Copper(DOFC),is a core component of terahertz travelling wave tubes.However,machining these high-aspect-ratio,multi-period microstructures with high precision through traditional micro-milling is highly challenging due to significant tool wear when employing micro-cutters with extremely small diameters.This study proposes a novel hybrid fabrication method,termed Water film assisted Laser Pre-channel combined with Micro-Milling(WLPMM),to efficiently produce SWS structures with superior precision and reduce tool wear.In the WLPMM approach,water film assisted laser processing is first utilized to generate a preliminary U-shaped pre-channel,leveraging the enhanced material removal capabilities afforded by water film's scouring effect,optimized laser power strategies,and scanning methodologies.This initial step significantly reduces material volume,facilitating subsequent micro-milling to refine dimensional accuracy and surface quality with only one micro-cutter consumed.Consequently,this method effectively eliminates clamping errors typically introduced by frequent tool changes.Comparative analyses between WLPMM,pure micro-milling,and laser-assisted micro-milling demonstrate that WLPMM significantly outperforms alternative approaches in terms of reduced tool consumption and improved machining efficiency.Furthermore,WLPMM maintains comparable surface finish and dimensional precision,highlighting its viability and advantages for fabricating high-aspect-ratio slow wave microstructures essential in advanced aerospace and precision instrumentation applications. 展开更多
关键词 High-aspect-ratio microstructure Micro-milling Slow wave structure Tool wear Water film-assisted laser processing
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Numerical Investigation of Fluid Energy Evolution Under the Wave-Induced Gap Resonance Between Stationary Floating Rectangular Structures 认领 引用
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作者 YU An-liang WANG Xin-yu +3 位作者 Domenico Davide MERINGOLO LIU Yong GONG Shao-dong WU Guo-xiang 《China Ocean Engineering》 SCIE EI CSCD 2026年第3期576-589,共14页
This study quantitatively examined the fluid energy evolution and dissipation process near narrow gaps formed between multiple floating rectangular structures under wave-induced gap resonance conditions.Given the limi... This study quantitatively examined the fluid energy evolution and dissipation process near narrow gaps formed between multiple floating rectangular structures under wave-induced gap resonance conditions.Given the limited understanding of gap resonance mechanisms through fluid energy analysis,a numerical wave flume based on theδ-LES-Smoothed Particle Hydrodynamics(SPH)approach was developed to investigate how incident wave and structural parameters influence the temporal evolution of fluid energy components.The findings reveal that for two floating boxes,the fluid energy dissipation within one wave period in the gap region between the boxes constitutes 81%of the total fluid energy dissipation in the fluid domain.This proportion remains consistent across varying incident wave heights under gap resonance conditions.The temporal distribution of fluid energy dissipation rate shows two peak values within one wave period,exhibiting significant waveform asymmetry.Additionally,in three-box configurations,the two narrow gap regions serve as primary zones of fluid energy dissipation,with energy dissipation patterns closely resembling those observed in the single gap region.Through comprehensive analysis of fluid energy evolution,this research advances the fundamental understanding of gap resonance mechanisms. 展开更多
关键词 multiple floating rectangular structures SPH method gap resonance wave energy evolution
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Wave Propagation in Periodic Composite Structures Through Isogeometric High-Order Homogenization 认领 引用
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作者 Xiaonan Su Wenjiong Chen Shutian Liu 《Acta Mechanica Solida Sinica》 SCIE EI CSCD 2026年第3期251-264,共14页
The theoretical research and development of wave propagation in periodic structures is the basis for studying dynamic response problems,dynamic mechanical properties of materials,medical ultrasonic problems,nondestruc... The theoretical research and development of wave propagation in periodic structures is the basis for studying dynamic response problems,dynamic mechanical properties of materials,medical ultrasonic problems,nondestructive testing and other problems.The isogeometric analysis(IGA),in conjunction with the high-order homogenization approach,is presented in this work for wave propagation analysis in periodic composite structures.Discretizing the microscopic characteristic function using non-uniform rational B-splines(NURBS)basis function improves the accuracy of high-order field calculations.The macro-and microscale wave equations are solved using the IGA method.The wave propagation equation is progressively expanded by using the asymptotic homogenization method based on multi-spatial scales within the isogeometric discretization framework,thereby reducing the sensitivity of the time step and the calculation time while maintaining the same level of accuracy.Several numerical examples are given to demonstrate the effectiveness of this isogeometric high-order homogenization(IGHH)model for wave propagation. 展开更多
关键词 Wave propagation Isogeometric analysis(IGA) High-order homogenization Wave dispersive Nonuniform rational B-splines(NURBS)
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Equivalent potential:the nexus of microwave and interface for modeling and regulating fluid structures 认领 引用
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作者 Wenkai Ye Tuo Ji Jiahua Zhu 《ENGINEERING Chemical Engineering》 SCIE EI CAS CSCD 2026年第4期93-100,共8页
The push for electrification in chemical engineering is accelerating the development of efficient technologies for external field intensification,such as microwave.These technologies aim to maximize the utilization of... The push for electrification in chemical engineering is accelerating the development of efficient technologies for external field intensification,such as microwave.These technologies aim to maximize the utilization of matter and energy.However,the emergence of fluid structure at nano-/microscopic levels,combined with the complex interactions between interfacial effects and microwave,poses significant challenges to existing theoretical frameworks.Traditional thermodynamic models,which rely on macroscopic experimental data within a phenomenological approach,may not accurately capture the precise variations in fluid structures at interfaces with microwave applied.In this perspective,we begin with quantum mechanics and propose the concept of equivalent potential,providing a fundamental principle to unify the impacts of interface and microwave.Meanwhile,the importance of fluid structure regulation within the framework of equivalent potential has been discussed,promoting deeper exploration of both thermal and nonthermal microwave effects.Looking ahead,the ongoing development and application of novel theoretical methods that decouple interfacial effects from external field effects,alongside advancements in in situ spectral characterization technologies,are expected to establish a paradigm based on the microscopic fluid structure regulation that better facilitates the utilization of microwaves in modern chemical engineering. 展开更多
关键词 fluid structure molecular polarization interfacial phenomena process intensification chemical engineering electrification
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Sandwich-structured long-wave infrared transparent electromagnetic shielding film using transmittance-enhanced wetting layer/Ag stacked conductive layers 认领 引用
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作者 Zhirui Zhang Yuyang Zhang +6 位作者 Le Zhao Zhi Wang Chi Zhang Yao Wu Ruifan Li Yonghao Han Chaoquan Hu 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第4期175-181,共7页
Designing infrared transparent electromagnetic shielding films(ITESFs)is challenging because carrier absorption and carrier transport occur simultaneously.Sandwich structures with Ag inserted into semiconductors can a... Designing infrared transparent electromagnetic shielding films(ITESFs)is challenging because carrier absorption and carrier transport occur simultaneously.Sandwich structures with Ag inserted into semiconductors can achieve synergy between transparency and electromagnetic shielding effectiveness,but Ag films alone suffer from island growth and optical loss.This work presents a sandwich structure using a transmittance-enhancing conductive layer composed of a wetting layer and Ag(WL/Ag).As a proof of concept,a Bi2Se3/Ti WL/Ag/Bi2Se3film was prepared,achieving a longwavelength infrared transmittance of 77% and a conductivity of 5988 S/cm.The electromagnetic shielding effectiveness reached~22 dB in the X band(8.2-12.4 GHz),meeting the requirement of protecting infrared optoelectronic devices from electromagnetic interference.High-resolution transmission electron microscopy and theoretical calculations showed that the Ti wetting layer enhances performance through high surface energy,low nk product values,and admittance matching.We proposed design criteria for wetting layers and identified candidate materials such as Cr.This study provides an optimization strategy for sandwich structures and introduces high-performance ITESFs for infrared optoelectronic devices. 展开更多
关键词 transmittance-enhanced wetting layer/Ag stacked films sandwich structure infrared transparent electromagnetic shielding film
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Study on mechanism of wave passage effect on the response of frame structure 认领 引用
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作者 Li Wenbo Liu Tielin Wang Yu 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2026年第3期695-713,共19页
Frequency effect,in addition to time delay effect,on the response of the frame structure to sinusoidal and earthquake wave passage excitations is studied,respectively.The dynamic equilibrium equation in terms of the d... Frequency effect,in addition to time delay effect,on the response of the frame structure to sinusoidal and earthquake wave passage excitations is studied,respectively.The dynamic equilibrium equation in terms of the displacements of horizontal DOFs for a single-span,one-story plane frame structure subjected to wave passage excitation is formulated,and the relative motion method and mode superposition method are used to solve the dynamic equilibrium equation.The analytical and semi-analytical solutions of structural responses of the frame structure to sinusoidal and earthquake wave passage excitations are given,respectively.A new cognition is obtained that the wave passage effect includes not only time delay effect but also frequency effect.The frequency effect is also the mechanism of wave passage effect for the frame structure.When the excitation frequency is within a range from a frequency slightly bigger than zero to a certain frequency less than the structural fundamental frequency,the lower the excitation frequency,the more significant wave passage effect.Earthquake wave passage effect for the frame structure depends on the low-frequency content of earthquake wave besides time delay,and the more the low-frequency content,the more significant wave passage effect. 展开更多
关键词 wave passage effect frame structure analytical solution earthquake excitation frequency effect
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Tunable lateral size and hierarchical structure SiP2@Ni low-dimensional aggregates for enhanced electromagnetic wave absorption 认领 引用
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《Journal of Materiomics》 SCIE EI CSCD 2026年第4期22-33,共12页
Simplifying the technology for regulating dielectric properties and enriching electromagnetic loss mechanisms of layered electromagnetic wave(EMW)absorption materials still faces challenges.Herein,we propose a simple ... Simplifying the technology for regulating dielectric properties and enriching electromagnetic loss mechanisms of layered electromagnetic wave(EMW)absorption materials still faces challenges.Herein,we propose a simple and eco-friendly sieving strategy to control the lateral size(3-50μm)of multilayered SiP2 flakes for regulating dielectric constants.Moreover,hierarchical-structured 2D SiP2@0D Ni nanoparticles/1D Ni chains low-dimensional aggregates are in-situ constructed on SiP2 flakes via a two-step hydrothermal method to enhance interfacial polarization and electromagnetic synergistic effects.When the lateral size was controlled at 11μm(SiP2-300),the intrinsic SiP2 exhibits strong reflection loss(RL)value of-38.9 dB at 1.7 mm.Notably,the construction of 2D/0D/1D SiP2@Ni not only maintains a strong RL of-40.1 dB,but also shifts the corresponding absorption frequency from original Ku-band(11.8 GHz)to C-band(7.2 GHz).More importantly,the effective absorption bandwidth is broadened from 2.9 GHz to 4.1 GHz benefiting from the construction of electromagnetic synergy networks.Additionally,the radar cross section(RCS)value(29.14 dB·m2)evaluated by the computer simulation technology(CST)results for SiP2@Ni-S2 confirm the excellent dissipation ability.This study provides a new strategy for the application of layered absorbers with low-frequency,broadband and adjustable EMW properties. 展开更多
关键词 Electromagnetic wave absorption Lateral size effect Low-dimensional aggregates Hierarchical structure Electromagnetic synergistic effects
Stochastic optimization model for port infrastructure planning considering uncertainties in wave and vessel arrival times 认领 引用
19
作者 Rajin Sihombing Ricky Lukman Tawekal +1 位作者 Muslim Muin Febri Zukhruf 《International Journal of Transportation Science and Technology》 EI CSCD 2026年第2期94-110,共17页
This paper proposes a stochastic optimization model that considers not only the uncertainties in wave and vessel arrival times but also sedimentation and tidal occurrence.Those factors impact the vessel’s operational... This paper proposes a stochastic optimization model that considers not only the uncertainties in wave and vessel arrival times but also sedimentation and tidal occurrence.Those factors impact the vessel’s operational cost,influencing the seaport’s competitiveness.Therefore,seaport operators need to decide the reference vessel size,dredging maintenance actions,and infrastructure required to ensure the smooth operation of the vessel.The optimization model is solved by invoking a variant of the genetic algorithm(GA).Case studies based on actual seaports in Indonesia are conducted to illustrate the model’s application and results clearly.It was found that the uncertainties of wave and vessel arrival are responsible for deviations in expected operational costs,while increasing infrastructure costs minimizes these deviations and reduces the expected operational costs. 展开更多
关键词 Stochastic optimization Port infrastructure Random wave Vessel arrival time uncertainty Genetic algorithm(GA)
Hybridization,microcurrent networks,and multi-interface effects in 2D/2D/2D Bi2MoO6/BiSx@NC/MoS2 heterostructure for electromagnetic wave absorption 认领 引用
20
作者 Yayun Deng Shijing Li +1 位作者 Ya Ning Xiaojun Zeng 《Journal of Materiomics》 SCIE EI CSCD 2026年第3期160-171,共12页
Two-dimensional(2D)materials,especially their heterostructures,have garnered significant attention in the field of electromagnetic wave(EMW)absorption,owing to their high specific surface area and the capability to ex... Two-dimensional(2D)materials,especially their heterostructures,have garnered significant attention in the field of electromagnetic wave(EMW)absorption,owing to their high specific surface area and the capability to extend EMW propagation paths.However,conventional 2D/2D heterostructures frequently encounter challenges such as limited interfacial diversity,poor impedance matching,and insufficient synergistic effects of loss mechanisms,which collectively constrain further advancement in EMW absorption.To address these limitations,we have engineered a novel 2D/2D/2D hierarchical heterostructure,denoted as Bi2MoO6/BiSx@nitrogen-doped carbon/MoS2(Bi2MoO6/BiSx@NC/MoS2).The distinctive architecture of this heterostructure features a rational layered configuration:the outer MoS2 layer functions as an“impedance matching layer”to promote EMW entry;the intermediate NC layer serves as a polarization-induced“trapping layer”to suppress secondary reflection;and the inner Bi2MoO6/BiSx layer acts as the“absorption layer”responsible for core energy dissipation.This deliberate multi-layer design facilitates interconnected microcurrent networks,induces multi-interface polarization,and harnesses multi-component hybridization effects,thereby achieving optimized impedance matching and synergistic dielectric/magnetic losses.Consequently,the designed heterostructure inherits exceptional EMW absorption performance,with an ultra-strong reflection loss(RL)of−63.57 dB and a broad effective absorption bandwidth(EAB)of 3.55 GHz at a matching thickness of only 2.85 mm.This work provides valuable insights into the structural design of advanced 2D heterostructures and offers a functional unit analysis perspective for developing high-performance EMW absorbers. 展开更多
关键词 Hybridization effects Microcurrent network effects Multi-interface effects 2D/2D/2D heterostructure Electromagnetic wave absorption
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