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Motion Performance Analysis of Offshore Lifting for Wind-Fishery Integrated Aquaculture Net Cage Considering Multi-Body Coupling Effects 认领 引用
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作者 WANG Wanqi YU Tongshun +2 位作者 LU Peng ZHAO Hui TAO Wei 《南方能源建设》 2026年第1期1-15,共15页
[Objective]This study aims to investigate the multi-body hydrodynamic interaction mechanisms during offshore lifting operations of aquaculture net cages in wind-fishery integration systems.By integrating numerical sim... [Objective]This study aims to investigate the multi-body hydrodynamic interaction mechanisms during offshore lifting operations of aquaculture net cages in wind-fishery integration systems.By integrating numerical simulations and dynamic analysis methods,this study systematically investigates the coupled dynamic response characteristics during the cage-carrier vessel separation process to reveal its dynamic evolution patterns and key influence mechanisms.[Method]Based on potential flow theory,a fully coupled dynamic analysis model of crane vessel-net cage-semi-submersible barge was established for a marine ranch project in Guangdong.The complete lifting process was dynamically simulated using SESAM software.Five typical operating sea states were configured to investigate the influence of wave parameters on the system's motion response under combined wave-current-wind actions.[Result]The results demonstrate that wave period dominates the system stability.Under short-period conditions,the system maintains stable motion with relatively small horizontal relative displacements,while long-period conditions excite low-frequency resonance,leading to significant slow-drift motions.Vertical response analysis reveals that long-period waves cause severe relative displacement fluctuations between the cage and semi-submersible vessel,with actual displacement amplitudes doubling the preset safety target of 2.045 m.Quantitative analysis further indicates that when significant wave height increases from 1.0 m to 1.5 m,the actual displacement amplitude increases by approximately 20%relative to the target displacement of 2.045 m,demonstrating that its influence is significantly weaker than the displacement variations induced by wave period changes.The complete dynamic simulation successfully captures the continuous dynamic response characteristics during the lifting process.[Conclusion]This research clarifies the influence mechanisms of wave parameters on the cage lifting process,identifying wave period as the crucial factor for operational safety.An operation window assessment method incorporating multi-body coupling effects is established,proposing a safety criterion with peak period not exceeding six seconds as the core requirement.The findings provide theoretical foundation for safe installation of marine ranch net cages and offer valuable references for similar offshore lifting operations. 展开更多
关键词 wind-fishery integration offshore lifting hydrodynamic analysis multi-body coupling analysis motion response safe operation window
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Research on Key Technologies for Traffic Organization in the Reconstruction and Expansion of Complex Interchanges and Elevated Lifting Sections 认领 引用
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作者 Ruyi Chen 《Journal of World Architecture》 2026年第2期71-78,共8页
Complex interchanges and elevated lifting sections represent critical nodes in the reconstruction and expansion projects of expressways and urban express roads,characterized by the most intricate structures,highest ri... Complex interchanges and elevated lifting sections represent critical nodes in the reconstruction and expansion projects of expressways and urban express roads,characterized by the most intricate structures,highest risks,and greatest traffic disruptions.Under conditions of heavy network traffic,limited construction space,frequent structural transitions,and interweaving multi-directional traffic flows,conventional traffic organization methods struggle to ensure both construction safety and network efficiency.To systematically address core challenges such as traffic dispersion,safety management,construction transitions,and network coordination faced during the reconstruction and expansion of complex interchanges and elevated lifting sections,this paper outlines the engineering characteristics and traffic pain points of these projects.It proposes key technologies for traffic organization in both complex interchange reconstruction and elevated lifting section reconstruction,aiming to provide technical references for similar complex node reconstruction projects.These technologies hold significant engineering value in enhancing traffic safety during construction,reducing congestion risks,and ensuring the smooth operation of the road network. 展开更多
关键词 Complex interchange Elevated lifting section Reconstruction and expansion Traffic organization Traffic transition Safety management Road network coordination
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Aero-propulsion analysis of distributed ducted-fan propulsion based on lifting-line driven body-force model 认领 引用 被引量：2
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作者 Hanru LIU Xingyu ZHAO +2 位作者 Fang ZHOU Yuyao FENG Yangang WANG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2025年第2期60-74,共15页
As the environmental problems become increasingly serious,distributed electrical propulsion systems with higher aerodynamic efficiency and lower pollution emission have received extensive attention in recent years.The... As the environmental problems become increasingly serious,distributed electrical propulsion systems with higher aerodynamic efficiency and lower pollution emission have received extensive attention in recent years.The distributed electrical propulsion usually employs the new aero-propulsion integrated configuration.A simulation strategy for internal and external flow coupling based on the combination of lifting line theory and body force method is proposed.The lifting line theory and body force method as source term are embedded into the Navier-Stokes formulation.The lift and drag characteristics of the aero-propulsion coupling configuration are simulated.The results indicate that the coupling configuration has the most obvious lift augmentation at 12°angle of attack,which can provide an 11.11%increase in lift for the airfoil.At 0°angle of attack,the pressure difference on the lip parts provides the thrust component,which results in a lower drag coefficient.Additionally,the failure impact of a ducted fan at the middle or edge on aerodynamics is investigated.For the two failure conditions,the lift of the coupling configuration is decreased significantly by 27.85%and 26.14%respectively,and the lip thrust is decreased by 70.74%and 56.48%respectively. 展开更多
关键词 Ducted fan Distributed electrical propulsion Lifting line theory Body force method Aero-propulsion integrated configuration
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Biomimetic inner helicoidal microfluidics with enhanced capillary rise for step liquid lifting mimicking transpiration 认领 引用 被引量：1
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作者 Zhaolong Wang Yinfeng Li +5 位作者 Ziheng Zhan Mingzhu Xie Yingying Li Chengqi Zhang Zhichao Dong Yong Shuai 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2025年第2期737-747,共11页
Bionic microfluidics is garnering increasing attention due to the superior fluidic performance enabled by biomimetic microstructures.Inspired by the unique structures of young pumpkin stems,we fabricate helicoidally p... Bionic microfluidics is garnering increasing attention due to the superior fluidic performance enabled by biomimetic microstructures.Inspired by the unique structures of young pumpkin stems,we fabricate helicoidally patterned microchannels with precisely controlled morphologies using the projection micro-stereolithography(PμSL)-based 3D printing technique.Our helicoidally patterned microchannels achieve approximately twice the liquid lifting height compared to similarly sized smooth microchannels.This improvement is attributed to the enhanced capillary force.The additional meniscus formed between the helicoidally patterned microstructures significantly contributes to the increased capillary effects.Furthermore,the underlying mechanisms of fluidic performance in helicoidally patterned microchannels are theorized using a newly developed equation,which is also employed to optimize the geometric parameters and fluidic performance of the biomimetic helicoidal microchannels.Additionally,our biomimetic helicoidally patterned microchannels facilitate a significant step-lifting phenomenon,mimicking tall trees'transpiration.The fluidic performance of our biomimetic helicoidally patterned microchannels show promise for applications in enhanced liquid lifting,step-lifting,clean-water production,and others. 展开更多
关键词 biomimetic helicoidally patterned microchannel enhanced capillary rise step lifting mimicked transpiration
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A lifting-wavelet-based iterative thresholding correction for atomic force microscopy images with vertical distortion 认领 引用
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作者 Yifan Bai Yinan Wu Yongchun Fang 《Nanotechnology and Precision Engineering》 EI CAS CSCD 2025年第3期29-40,共12页
To eliminate distortion caused by vertical drift and illusory slopes in atomic force microscopy(AFM)imaging,a lifting-wavelet-based iterative thresholding correction method is proposed in this paper.This method achiev... To eliminate distortion caused by vertical drift and illusory slopes in atomic force microscopy(AFM)imaging,a lifting-wavelet-based iterative thresholding correction method is proposed in this paper.This method achieves high-quality AFM imaging via line-by-line corrections for each distorted profile along the fast axis.The key to this line-by-line correction is to accurately simulate the profile distortion of each scanning row.Therefore,a data preprocessing approach is first developed to roughly filter out most of the height data that impairs the accuracy of distortion modeling.This process is implemented through an internal double-screening mechanism.A line-fitting method is adopted to preliminarily screen out the obvious specimens.Lifting wavelet analysis is then carried out to identify the base parts that are mistakenly filtered out as specimens so as to preserve most of the base profiles and provide a good basis for further distortion modeling.Next,an iterative thresholding algorithm is developed to precisely simulate the profile distortion.By utilizing the roughly screened base profile,the optimal threshold,which is used to screen out the pure bases suitable for distortion modeling,is determined through iteration with a specified error rule.On this basis,the profile distortion is accurately modeled through line fitting on the finely screened base data,and the correction is implemented by subtracting the modeling result from the distorted profile.Finally,the effectiveness of the proposed method is verified through experiments and applications. 展开更多
关键词 Atomic force microscopy Lifting wavelet analysis Iterative thresholding algorithm Vertical distortion
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Experimental investigation of particle-induced pressure loss in solid–liquid lifting pipe 认领 引用 被引量：10
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作者 宋跃文 朱小军 +1 位作者 孙志强 唐达生 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第9期2114-2120,共7页
In order to investigate the characteristics of particle-induced pressure loss in the solid–liquid lifting pipe,a series of experiments were conducted in 200 mm diameter lifting pipe.Simulation manganese nodules with ... In order to investigate the characteristics of particle-induced pressure loss in the solid–liquid lifting pipe,a series of experiments were conducted in 200 mm diameter lifting pipe.Simulation manganese nodules with five different mean diameters of10 mm,20 mm,30 mm,40 mm and 50 mm were used,both in isolation and a combination in equal fraction by mass.The flow velocities in the lifting pipe ranged from 0.12 m/s to 1.61 m/s,and the mass of particles employed was 10 kg for each particle diameter.Three regimes,wavy bed,partly fluidization,and fully fluidization,were observed over the flow velocity.The solid–liquid pressure drop data were measured by differential pressure transmitter,and pressure drop caused by the solid particles was calculated and analyzed.The results show that the evolutions of the pressure loss due to solid particles are relevant to the solid–liquid flow regimes,and they are distinctly influenced by fluid velocity and particle size. 展开更多
关键词 lifting pipe pressure loss simulation manganese nodules flow regimes
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Model test investigation on an innovative lifting system for deepwater riser installation 认领 引用 被引量：4
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作者 Mao Dongfeng Duan Menglan +3 位作者 Wang Yi He Ning Chen Bangmin Zhang Yingjie 《Petroleum Science》 SCIE CAS 2010年第4期547-554,共8页
An S-lay crane barge,named CNOOC 201,has been built for pipe laying in deepwater oil/gas fields in the South China Sea.It is due to be commissioned by the end of the year 2010.A special lifting system is developed to ... An S-lay crane barge,named CNOOC 201,has been built for pipe laying in deepwater oil/gas fields in the South China Sea.It is due to be commissioned by the end of the year 2010.A special lifting system is developed to meet the challenge that installing deepwater risers from an S-lay barge is difficult and has not been achieved.The purpose of this paper was to investigate the model test on such an innovative system,which has to be done before field application.By applying the similarity theory,the movement of the S-lay barge is simulated through a six degrees-of-freedom motion platform,and a truncated model riser is utilized for the model testing.The displacement and force boundary conditions at the truncated position of the riser are obtained from the catenary governing equation and become realized by a slideway cart and a loading system designed to control the configuration of the model riser,which presents a similar configuration to a real riser in deepwater.The test results are in very good agreement with theoretical calculations,showing that the active truncated test is applicable for controlling the configuration of the deepwater riser in model testing investigation. 展开更多
关键词 Deepwater riser lifting system model test six degrees-of-freedom motion platform active truncation
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A new method of inhibiting pollutant release from source water reservoir sediment by adding chemical stabilization agents combined with water-lifting aerator 认领 引用 被引量：5
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作者 Beibei Chai Tinglin Huang +1 位作者 Weihuang Zhu Fengying Yang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2011年第12期1977-1982,共6页
Source water reservoirs easily become thermally and dynamically stratified.Internal pollution released from reservoir sediments is the main cause of water quality problems.To mitigate the internal pollution more effec... Source water reservoirs easily become thermally and dynamically stratified.Internal pollution released from reservoir sediments is the main cause of water quality problems.To mitigate the internal pollution more effectively,a new method,which combined chemical stabilization with water lifting aerator(WLA)technology,was proposed and its effciency in inhibiting pollutant release was studied by controlled sediment-water interface experiments.The results showed that this new method can inhibit pollutant release from sediment effectively.The values of mean effciency(E)in different reactors 2#–5#(1#with no agent,2#10 mg/L polymeric aluminum chloride(PAC)was added,3#20 mg/L PAC was added,4#30 mg/L PAC was added,5#20 mg/L PAC and 0.2 mg/L palyacrylamide(PAM)were added)for PO43-were 35.0%,43.9%,50.4%and 63.6%,respectively.This showed that the higher the PAC concentration was,the better the inhibiting effciency was,and PAM addition strengthened the inhibiting effciency significantly.For Fe2+,the corresponding values of E for the reactors 2#–5#were 22.9%,47.2%,34.3%and 46.2%,respectively.The inhibiting effect of PAC and PAM on Mn release remained positive for a relatively short time,about 10 days,and was not so effective as for PO43-and Fe2+.The average effciencies in inhibiting the release of UV254 were 35.3%,25.9%,35.5%,38.9%and 39.5%for reactors 2#–5#,respectively.The inhibiting mechanisms of the agents for different pollutants varied among the conditions and should be studied further. 展开更多
关键词 deep reservoir chemical stabilization water lifting aerator(WLA) phosphate release coagulants PAC and PAM
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Analysis on Shock Wave Speed of Water Hammer of Lifting Pipes for Deep-Sea Mining 认领 引用 被引量：6
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作者 周知进 阳宁 王钊 《China Ocean Engineering》 SCIE EI CSCD 2013年第2期205-214,共10页
Water hammer occurs whenever the fluid velocity in vertical lifting pipe systems for deep-sea mining suddenly changes. In this work, the shock wave was proven to play an important role in changing pressures and period... Water hammer occurs whenever the fluid velocity in vertical lifting pipe systems for deep-sea mining suddenly changes. In this work, the shock wave was proven to play an important role in changing pressures and periods, and mathematical and numerical modeling technology was presented for simulated transient pressure in the abnormal pump operation. As volume concentrations were taken into account of shock wave speed, the experiment results about the pressure-time history, discharge-time history and period for the lifting pipe system showed that： as its concentrations rose up, the maximum transient pressure went down, so did its discharges; when its volume concentrations increased gradually, the period numbers of pressure decay were getting less and less, and the corresponding shock wave speed decreased. These results have highly coincided with simulation results. The conclusions are important to design lifting transporting system to prevent water hammer in order to avoid potentially devastating consequences, such as damage to components and equipment and risks to personnel. 展开更多
关键词 lifting pipe for transporting coarse particles abnormal pump operation fluid transients water hammer shock wave speed
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Retrocaval liver lifting maneuver and modifications of total hepatic vascular exclusion for liver tumor resection 认领 引用 被引量：5
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作者 Saiho Ko Yuuki Kirihatayfa +5 位作者 Yayoi Matsumoto Tadataka Takagi Masanori Matsusaka Tomohide Mukogawa Hirofumi Ishikawa Akihiko Watanabe 《World Journal of Hepatology》 2016年第8期411-420,共10页
AIM: To evaluate the efficacy of technical modifications of total hepatic vascular exclusion(THVE) for hepatectomy involving inferior vena cava(IVC).METHODS: Of 301 patients who underwent hepatectomy during the immedi... AIM: To evaluate the efficacy of technical modifications of total hepatic vascular exclusion(THVE) for hepatectomy involving inferior vena cava(IVC).METHODS: Of 301 patients who underwent hepatectomy during the immediate previous 5-year period, 8(2.7%) required THVE or modified methods of IVC cross-clamping for resection of liver tumors with massive involvement of the IVC. Seven of the patients had diagnosis of colorectal liver metastases and 1 had diagnosis of hepatocellular carcinoma. All tumors involved the IVC, and THVE was unavoidable for combined resection of the IVC in all 8 of the patients. Technical modifications of THVE were applied to minimize the extent and duration of vascular occlusion, thereby reducing the risk of damage.RESULTS: Broad dissection of the space behind the IVC coupled with lifting up of the liver from the retrocaval space was effective for controlling bleeding around the IVC before and during THVE. The procedures facilitate modification of the positioning of the cranial IVC cross-clamp. Switching the cranial IVC cross-clamp from supra- to retrohepatic IVC or to the confluence of hepatic vein decreased duration of the THVE while restoring hepatic blood flow or systemic circulation via the IVC. Oblique cranial IVC cross-clamping avoided ischemia of the remnant hemi-liver. With these technicalmodifications, the mean duration of THVE was 13.4 ± 8.4 min, which was extremely shorter than that previously reported in the literature. Recovery of liver function was smooth and uneventful for all 8 patients. There was no case of mortality, re-operation, or severe complication(i.e., Clavien-Dindo grade of Ⅲ or more).CONCLUSION: The retrocaval liver lifting maneuver and modifications of cranial cross-clamping were useful for minimizing duration of THVE. 展开更多
关键词 Total hepatic vascular exclusion Retrocaval liver lifting maneuver Oblique clamping Switching the clamp Hepatectomy
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H_∞Design for Sampled-Data Systems via Lifting Technique:Conditions and Limitation 认领 引用 被引量：5
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作者 WANG Guang-Xiong LIU Yan-Wen HE Zhen 《自动化学报》 EI CAS 北大核心 2006年第5期791-795,共5页
The initial motivation of the lifting technique is to solve the H∞control problems.However,the conventional weighted H∞design does not meet the conditions required by lifting,so the result often leads to a misjudgem... The initial motivation of the lifting technique is to solve the H∞control problems.However,the conventional weighted H∞design does not meet the conditions required by lifting,so the result often leads to a misjudgement of the design.Two conditions required by using the lifting technique are presented based on the basic formulae of the lifting.It is pointed out that only the H∞disturbance attenuation problem with no weighting functions can meet these conditions,hence,the application of the lifting technique is quite limited. 展开更多
关键词 Sampled-data control system lifting technique design limitation H∞synthesis
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Design and Strength Analysis of A Spherical Connector for Lifting Subsystem in Deep Sea Mining System 认领 引用 被引量：4
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作者 冯雅丽 张文明 冯福璋 《China Ocean Engineering》 SCIE EI 2006年第4期605-613,共9页
A flexible connector of lifting pipes in a deep sea mining system is designed. The buttress thread （ based on API standard） is used and foreign experience in connector design is referred to. With this kind of connec... A flexible connector of lifting pipes in a deep sea mining system is designed. The buttress thread （ based on API standard） is used and foreign experience in connector design is referred to. With this kind of connector, the lifting pipe wiU only bear the axial force, free of moment. The strength of the connector is analyzed in detail, including the connecting strength of the buttress thread, the dynamic load of the pipe system, pressures inside and outside of the pipe, the lateral stress of the pipe wall and so on. Especially, a geometric model is built for 3-D contact stress analysis. The distribution graph of contact stress is presented. It is indicated that the strength of the spherical connector meets the demand. 展开更多
关键词 pipe joint lifting pipe contact stress spherical joint buttress thread deep sea mining
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一种生成双正交紧支复小波的Lifting方法 认领 引用 被引量：18
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作者 陈祥训 淡文刚 《中国电机工程学报》 EI 北大核心 2001年第5期34-37,42,共4页
提出了一种构造双正交紧支复小波的方法 :以现有任何一种正交或双正交实小波为基础 ,可构造出消失矩阶数可任意选定的无穷多个相频特性 (包括线性相位特性 )不同的双正交紧支复小波。其特点为 :由于是双正交紧支型 ,可采用Mallat算法等... 提出了一种构造双正交紧支复小波的方法 :以现有任何一种正交或双正交实小波为基础 ,可构造出消失矩阶数可任意选定的无穷多个相频特性 (包括线性相位特性 )不同的双正交紧支复小波。其特点为 :由于是双正交紧支型 ,可采用Mallat算法等快速算法 ,因此使用时实时性好 ;因为是复小波 ,所以能提取电力系统至关重要的相位信息 ;具有多种相频特性 ,便于与相频特性多变的电力系统信号匹配等 ,因此这类小波在电力系统有广泛的应用前景。 展开更多
关键词 电力系统 小波分析 Lifting方法 双正交紧支复小波
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Viscosity profile prediction of a heavy crude oil during lifting in two deep artesian wells 认领 引用 被引量：2
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作者 Yibo Li Hao Gao +4 位作者 Wanfen Pu Bing Wei Yafei Chen Dong Li Qiang Luo 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2017年第7期976-982,共7页
It has been known that the productivity of artesian wells is strongly dependent on the rheological properties of crude oils. This work targets two deep artesian wells(>5000 m) that are producing heavy crude oil. Th... It has been known that the productivity of artesian wells is strongly dependent on the rheological properties of crude oils. This work targets two deep artesian wells(>5000 m) that are producing heavy crude oil. The impacts of well conditions including temperature, pressure and shear rate, on the crude oil rheology were comprehensively investigated and correlated using several empirical rheological models. The experimental data indicate that this heavy oil is very sensitive to temperature as result of microstructure change caused by hydrogen bonding. The rheological behavior of the heavy oil is also significantly impacted by the imposed pressure, i.e., the viscosity flow activation energy(Eμ) gently increases with the increasing pressure. The viscosity–shear rate data are well fitted to the power law model at low temperature. However, due to the transition of fluid feature at high temperature(Newtonian fluid), the measured viscosity was found to slightly deviate from the fitting data. Combining the evaluated correlations, the viscosity profile of the heavy crude oil in these two deep artesian wells as a function of well depth was predicted using the oilfield producing data. 展开更多
关键词 Heavy oil Rheological properties Empirical correlation Viscosity profile predication Lifting process Artesian well
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Acupuncture of lifting and pressing manipulation for upper limb paralysis after stroke 认领 引用 被引量：2
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作者 丁邦友 段君毅 +1 位作者 周艳丽 曹晓雯 《World Journal of Acupuncture-Moxibustion》 CAS CSCD 2016年第2期31-36,共6页
Objective To compare the difference of clinical efficacy between acupuncture of lifting and pressing manipulation and conventional acupuncture in motor function recovery of hemiplegic upper limb after stroke, so as to... Objective To compare the difference of clinical efficacy between acupuncture of lifting and pressing manipulation and conventional acupuncture in motor function recovery of hemiplegic upper limb after stroke, so as to provide referential support for clinical application. Method Fifty-nine patients with upper limb hemiplegia after stroke were selected and divided into group A （conventional acupuncture ± lifting and pressing manipulation, 30 cases} and group B （conventional acupuncture, 29 cases} according to random number table method. Upper limb motor function and activity of daily living of patients in the two groups were scored before and after treatment, and the results were analyzed and compared. Results The score of upper limb FugI-Meyer motor function of patients was 22.4 ± 2.83 and 32.97 ± 2.92 before and after treatment in group A, and was 19.89 ± 3.13 and 26.62 ± 3.31 before and after treatment in group B, and the difference between the two groups before and after treatment was significant （P〈0.01}. The score of Barthel index of patients was 60.67 ± 4.65 and 73.00 ± 3.82 before and after treatment in group A, and was 50.52 ± 5.15 and 60.17 ± 4.89 before and after treatment in group B, and the difference between the two groups before and after treatment was not statistcally significant {P〉0.05）. Conclusion Lifting and pressing manipulation combined with conventional acupuncture can better improve upper limb motor function of upper limb paralysis of patients after stroke. 展开更多
关键词 limbs hemiplegia after stroke acupuncture manipulating efficacyevaluation lifting and pressing method
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Construction analysis on integral lifting of steel structure by the vector form intrinsic finite element 认领 引用 被引量：3
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作者 朱明亮 陈雪琪 郭正兴 《Journal of Southeast University(English Edition)》 EI CAS 2016年第4期451-456,共6页
A newnumerical method based on vector form intrinsic finite element（VFIFE） is proposed to simulate the integral lifting process of steel structures. First, in order to verify the validity of the VFIFE method, taking... A newnumerical method based on vector form intrinsic finite element（VFIFE） is proposed to simulate the integral lifting process of steel structures. First, in order to verify the validity of the VFIFE method, taking the steel gallery between the integrated building and the attached building of Nanjing M obile Communication Buildings for example, the static analysis was carried out and the corresponding results were compared with the results achieved by the traditional finite element method. Then, according to the characteristics of dynamic construction of steel structure integral lifting, the tension cable element was employed to simulate the behavior of dynamic construction. The VFIFE method avoids the iterative solution of the stiffness matrix and the singularity problems. Therefore, it is simple to simulate the complete process of steel structure lifting construction.Finally, by using the VFIFE, the displacement and internal force time history curves of the steel structures under different lifting speeds are obtained. The results show that the lifting speed has influence on the lifting force, the internal force, and the displacement of the structure. In the case of normal lifting speed, the dynamic magnification factor of 1. 5 is safe and reasonable for practical application. 展开更多
关键词 integral lifting vector form intrinsic finite element（VFIFE） steel gallery whole process of construction dynamic magnification factor
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Bionic microchannels for step lifting transpiration 认领 引用 被引量：1
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作者 Zhaolong Wang Qiu Yin +7 位作者 Ziheng Zhan Wenhao Li Mingzhu Xie Huigao Duan Ping Cheng Ce Zhang Yongping Chen Zhichao Dong 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2023年第2期244-252,共9页
Those various cross-sectional vessels in trees transfer water to as high as 100 meters,but the traditional fabrication methods limit the manufacturing of those vessels,resulting in the non-availability of those bionic... Those various cross-sectional vessels in trees transfer water to as high as 100 meters,but the traditional fabrication methods limit the manufacturing of those vessels,resulting in the non-availability of those bionic microchannels.Herein,we fabricate those bionic microchannels with various cross-sections by employing projection micro-stereolithography(PμSL)based 3D printing technique.The circumradius of bionic microchannels(pentagonal,square,triangle,and five-pointed star)can be as small as 100μm with precisely fabricated sharp corners.What's more,those bionic microchannels demonstrate marvelous microfluidic performance with strong precursor effects enabled by their sharp corners.Most significantly,those special properties of our bionic microchannels enable them outstanding step lifting performance to transport water to tens of millimeters,though the water can only be transported to at most 20 mm for a single bionic microchannel.The mimicked transpiration based on the step lifting of water from bionic microchannels is also achieved.Those precisely fabricated,low-cost,various cross-sectional bionic microchannels promise applications as microfluidic chips,long-distance unpowered water transportation,step lifting,mimicked transpiration,and so on. 展开更多
关键词 bionic microchannel microfluidics water transportation step lifting 3D printing
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Dynamic Analysis of Pipeline Lifting Operations for Different Current Velocities and Wave Heights 认领 引用 被引量：2
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作者 Dapeng Zhang Bowen Zhao Keqiang Zhu 《Fluid Dynamics & Materials Processing》 EI 2023年第3期603-617,共15页
Pipelines are widely used for transporting oil resources in the context of offshore oil exploitation.The pipeline stress-strength analysis is an important stage in related design and ensuing construction techniques.In... Pipelines are widely used for transporting oil resources in the context of offshore oil exploitation.The pipeline stress-strength analysis is an important stage in related design and ensuing construction techniques.In this study,assuming representative work environment parameters,pipeline lifting operations are investigated numerically.More specifically,a time-domain coupled dynamic analysis method is used to conduct a hydrodynamic analysis under different current velocities and wave heights.The results show that proper operation requires the lifting points are reasonably set in combination with the length of the pipeline and the position of the lifting device on the construction ship.The impact of waves on the pipeline is limited,however lifting operations under strong wind and waves should be avoided as far as possible. 展开更多
关键词 Pipeline OrcaFlex hydrodynamic analysis lifting operation
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Lifting transform via Savitsky-Golay filter predictor and application of denoising 认领 引用 被引量：4
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作者 周广柱 杨锋杰 王翠珍 《Journal of Coal Science & Engineering(China)》 2006年第2期66-69,共4页
The Savitsky-Golay filter isa smoothing filter based on polynomial regression.Itemploys the regression fitting capacity to improve the smoothing results.But Savit-sky-Golay filter uses a fix sized window.It has the sa... The Savitsky-Golay filter isa smoothing filter based on polynomial regression.Itemploys the regression fitting capacity to improve the smoothing results.But Savit-sky-Golay filter uses a fix sized window.It has the same shortage of Window FourierTransform.Wavelet mutiresolution analysis may deal with this problem.In this paper,tak-ing advantage of Savitsky-Golay filter's fitting ability and the wavelet transform's multiscaleanalysis ability,we developed a new lifting transform via Savitsky-Golay smoothing filteras the lifting predictor,and then processed the signals comparing with the ordinary Savit-sky-Golay Smoothing method.We useed the new lifting in noisy heavy sine denoising.Thenew transform obviously has better denoise ability than ordinary Savitsky-Golay smooth-ing method.At the same time singular points are perfectly retained in the denoised signal.Singularity analysis,multiscale interpolation,estimation,chemical data smoothing andother potential signal processing utility of this new lifting transform are in prospect. 展开更多
关键词 lifting wavelet Savitsky-Golay filter predictor denoise
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Experiment and Simulation for Articulated Lifting Subsystem of 1000 m Deep Sea Mining System 认领 引用 被引量：1
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作者 冯雅丽 张文明 +1 位作者 冯福璋 徐妍 《China Ocean Engineering》 SCIE EI 2007年第3期525-532,共8页
The experiment system of 1000 m deep sea mining system is built up with the similarity theory. Sine mechanism is used to simulate mining ship to generate lateral shock excitation by ocean wave. Simulation and experime... The experiment system of 1000 m deep sea mining system is built up with the similarity theory. Sine mechanism is used to simulate mining ship to generate lateral shock excitation by ocean wave. Simulation and experiment of spherical joint connecting deep sea mining system has been done in band six marine conditions. The results indicate that the moment of spherical joint connecting deep sea mining is smaller than that of the thread connected ones, the lifting pipe of sphelical joint is ＂flexible pipe＂. The flexural torque of the articulated lifting pipe system in pump and buffer is generally periodic variation with some irregularity, the value is stable on 60 N·S, and it is obviously smaller than that of the fixed lifting pipe system; The total displacement exhibits cyclic variation pattern, and the periodicity of them is longer than that of sea current. The results of experiment and simulation are basically consistent. And the analysis in the paper offers theoretical foundation of 1000 m deep sea mining system in China. 展开更多
关键词 articulated lifting system 1000 m deep sea mining pilot-scale system similarity theory lateral displacement
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