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The Stress Combination Method for the Fatigue Assessment of the Hatch Corner of a Bulk Carrier Based on Equivalent Waves 认领 引用
1
作者 Guoqing Feng Hao Sun +1 位作者 Dongping Liu Hui Li 《Journal of Marine Science and Application》 2012年第1期68-73,共6页
The stress combination method for the fatigue assessment of the hatch comer of a bulk carrier was investigated based on equivalent waves.The principles of the equivalent waves of ship structures were given,including t... The stress combination method for the fatigue assessment of the hatch comer of a bulk carrier was investigated based on equivalent waves.The principles of the equivalent waves of ship structures were given,including the determination of the dominant load parameter,heading,frequency,and amplitude of the equivalent regular waves.The dominant load parameters of the hatch comer of a bulk carrier were identified by the structural stress response analysis,and then a series of equivalent regular waves were defined based on these parameters.A combination method of the structural stress ranges under the different equivalent waves was developed for the fatigue analysis.The combination factors were obtained by least square regression analysis with the stress ranges derived from spectral fatigue analysis as the target value.The proposed method was applied to the hatch comer of another bulk carrier as an example.This shows that the results from the equivalent wave approach agree well with those from the spectral fatigue analysis.The workload is reduced substantially.This method can be referenced in the fatigue assessment of the hatch comer of a bulk carrier. 展开更多
关键词 stress combination method equivalent wave bulk carrier hatch comer fatigue strengthassessment ship structures
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Combination Method for Parallel Computation in ODEs 认领 引用
2
作者 Song Xiaoqiu 《Journal of Systems Engineering and Electronics》 1996年第4期19-26,共8页
In this paper, a 3rd order combination method with three processes and a 4th order combination method with five processes for solving ODEs are discussed. These methods are the Runge-Kutta method combined with a linear... In this paper, a 3rd order combination method with three processes and a 4th order combination method with five processes for solving ODEs are discussed. These methods are the Runge-Kutta method combined with a linear multistep method, which overcomes the defect of the 3rd order parallel Runge-Kutta method discussed in [1]. 展开更多
关键词 Software Reliability Numerical analysis Combination method Parallel Computation,ODEs.
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Analysis of the Combination Method of Landscape Design and Landscape Construction 认领 引用
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作者 QIJiahuan 《外文科技期刊数据库（文摘版）工程技术》 2022年第7期005-008,共4页
As the first stage of landscape construction, landscape design plays an important role in promoting and implementing landscape projects. Construction is the process of implementing the concept of landscape design. If ... As the first stage of landscape construction, landscape design plays an important role in promoting and implementing landscape projects. Construction is the process of implementing the concept of landscape design. If the constructor cant communicate well with the designer before the construction, he will know little about the creative concept of the project, or the constructor will change the design plan without knowing the design intention, which greatly affects the construction quality of the garden project. Therefore, scientific and reasonable garden design is needed, and the coordination between design and construction should be strengthened to produce higher quality projects and achieve the expected landscape effect. 展开更多
关键词 landscape design garden construction combination method
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Combination solution method based on the analogy of the generalized-αmethod for rigid-flexible coupling structural dynamics 认领 引用
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作者 Haoxiang Wang Huimin Zhang Yufeng Xing 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第7期424-443,共20页
In this paper,a combination solution method based on the analogy of the generalized-α(AG-α)method is proposed to solve linear rigid-flexible coupling structural dynamic problems,which is termed the G-G(ρ1∞,ρ_(... In this paper,a combination solution method based on the analogy of the generalized-α(AG-α)method is proposed to solve linear rigid-flexible coupling structural dynamic problems,which is termed the G-G(ρ1∞,ρ2∞)combination solution method.In the G-G(ρ1∞,ρ2∞)method,the degrees of freedom of the system are divided into two groups.One group with larger stiffness is solved by using the AG-αmethod with parameters determined by the spectral radiusρ1∞corresponding to the infinite frequency.The other,with smaller stiffness,is solved by using the AG-αmethod with parameters determined byρ2∞.Taking two differential equations of second order as test equations,the amplification matrix of the G-G(ρ1∞,ρ2∞)method has two pairs of principal eigenvalues and two spurious eigenvalues.The percentage amplitude decay and period elongation are defined and investigated with the two algorithmic frequencies and two algorithmic damping ratios.In addition,the accuracy order and stability of the combination method are discussed.Numerical examples show that the G-G(ρ1∞,ρ2∞)method can filter out the high-frequency modes and simultaneously keep the low-frequency modes when solving rigid-flexible coupling structural dynamic problems,and its numerical performances are superior to the AG-αmethod. 展开更多
关键词 Combination solution method Time integration method Rigid-flexible coupling Accuracy order
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Data-Driven Combination-Interval Prediction for Landslide Displacement Based on Copula and VMD-WOA-KELM Method 认领 引用 被引量：2
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作者 Longqi Li Yunhuang Yang +1 位作者 Tianzhi Zhou Mengyun Wang 《Journal of Earth Science》 SCIE CAS CSCD 2025年第1期291-306,共16页
To tackle the difficulties of the point prediction in quantifying the reliability of landslide displacement prediction,a data-driven combination-interval prediction method(CIPM)based on copula and variational-mode-dec... To tackle the difficulties of the point prediction in quantifying the reliability of landslide displacement prediction,a data-driven combination-interval prediction method(CIPM)based on copula and variational-mode-decomposition associated with kernel-based-extreme-learningmachine optimized by the whale optimization algorithm(VMD-WOA-KELM)is proposed in this paper.Firstly,the displacement is decomposed by VMD to three IMF components and a residual component of different fluctuation characteristics.The key impact factors of each IMF component are selected according to Copula model,and the corresponding WOA-KELM is established to conduct point prediction.Subsequently,the parametric method(PM)and non-parametric method(NPM)are used to estimate the prediction error probability density distribution(PDF)of each component,whose prediction interval(PI)under the 95%confidence level is also obtained.By means of the differential evolution algorithm(DE),a weighted combination model based on the PIs is built to construct the combination-interval(CI).Finally,the CIs of each component are added to generate the total PI.A comparative case study shows that the CIPM performs better in constructing landslide displacement PI with high performance. 展开更多
关键词 landslide displacement interval prediction combination method copula Landslides VMD-WOA-KELM
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Improvement of Stability of a High-Loaded Axial Flow Compressor by a Combined Flow Control Method 认领 引用
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作者 MENG Dejun YIN Haibao LIU Jie 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2026年第2期286-300,共15页
This study investigates a high⁃loaded axial compressor in which flow instabilities in the rotor and the stator occur almost concurrently.Under these conditions,conventional stability enhancement methods prove to be in... This study investigates a high⁃loaded axial compressor in which flow instabilities in the rotor and the stator occur almost concurrently.Under these conditions,conventional stability enhancement methods prove to be ineffective.The paper proposes a combined rotor-stator flow control technique.This study reveals that the flow field deterioration stems from combined flow blockage at the rotor tip region and the near-hub region of the stator.Research on flow control methods finds that self-recirculating casing treatment can effectively improve flow capacity in the rotor tip region,but simultaneously reduce flow capacity in the near-hub zone.This makes the hub flow field more susceptible to breakdown and ultimately triggers compressor instability.Thus,the self-recirculating casing treatment fails to enhance stall margin.By contrast,hub suction significantly improves the hub-region flow field.Yet without suppressing the rotor-tip flow blockage,it achieves limited stability enhancement.The integrated solution combining self-recirculating casing treatment with hub suction simultaneously addresses flow blockage at both the rotor tip and the stator near-hub regions.This combined flow control method delivers effective stability enhancement,achieving 6.78%increase in compressor stall margin. 展开更多
关键词 axial flow compressor high load stability combined flow control method flow mechanism
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Comprehensive evaluation of the transformer oil-paper insulation state based on RF-combination weighting and an improved TOPSIS method 认领 引用 被引量：13
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作者 Fugen Song Shichao Tong 《Global Energy Interconnection》 EI CSCD 2022年第6期654-665,共12页
The accurate identification of the oil-paper insulation state of a transformer is crucial for most maintenance strategies.This paper presents a multi-feature comprehensive evaluation model based on combination weighti... The accurate identification of the oil-paper insulation state of a transformer is crucial for most maintenance strategies.This paper presents a multi-feature comprehensive evaluation model based on combination weighting and an improved technique for order of preference by similarity to ideal solution(TOPSIS)method to perform an objective and scientific evaluation of the transformer oil-paper insulation state.Firstly,multiple aging features are extracted from the recovery voltage polarization spectrum and the extended Debye equivalent circuit owing to the limitations of using a single feature for evaluation.A standard evaluation index system is then established by using the collected time-domain dielectric spectrum data.Secondly,this study implements the per-unit value concept to integrate the dimension of the index matrix and calculates the objective weight by using the random forest algorithm.Furthermore,it combines the weighting model to overcome the drawbacks of the single weighting method by using the indicators and considering the subjective experience of experts and the random forest algorithm.Lastly,the enhanced TOPSIS approach is used to determine the insulation quality of an oil-paper transformer.A verification example demonstrates that the evaluation model developed in this study can efficiently and accurately diagnose the insulation status of transformers.Essentially,this study presents a novel approach for the assessment of transformer oil-paper insulation. 展开更多
关键词 Combined weight method Random forest algorithm Insulation aging assessment Oil-paper insulation Time-domain eigenvalue
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Evaluation of soil erosion vulnerability in Hubei Province of China using RUSLE model and combination weighting method 认领 引用 被引量：1
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作者 YANG Yanpan TIAN Pei +3 位作者 JIA Tinghui WANG Fei YANG Yang HUANG Jianwu 《Journal of Mountain Science》 SCIE CSCD 2024年第10期3318-3336,共19页
Soil erosion has been recognized as a critical environmental issue worldwide.While previous studies have primarily focused on watershed-scale soil erosion vulnerability from a natural factor perspective,there is a not... Soil erosion has been recognized as a critical environmental issue worldwide.While previous studies have primarily focused on watershed-scale soil erosion vulnerability from a natural factor perspective,there is a notable gap in understanding the intricate interplay between natural and socio-economic factors,especially in the context of spatial heterogeneity and nonlinear impacts of human-land interactions.To address this,our study evaluates the soil erosion vulnerability at a provincial scale,taking Hubei Province as a case study to explore the combined effects of natural and socio-economic factors.We developed an evaluation index system based on 15 indicators of soil erosion vulnerability:exposure,sensitivity,and adaptability.In addition,the combination weighting method was applied to determine index weights,and the spatial interaction was analyzed using spatial autocorrelation,geographical temporally weighted regression and geographical detector.The results showed an overall decreasing soil erosion intensity in Hubei Province during 2000 and 2020.The soil erosion vulnerability increased before 2000 and then.The areas with high soil erosion vulnerability were mainly confined in the central and southern regions of Hubei Province(Xiantao,Tianmen,Qianjiang and Ezhou)with obvious spatial aggregation that intensified over time.Natural factors(habitat quality index)had negative impacts on soil erosion vulnerability,whereas socio-economic factors(population density)showed substantial spatial variability in their influences.There was a positive correlation between soil erosion vulnerability and erosion intensity,with the correlation coefficients ranging from-0.41 and 0.93.The increase of slope was found to enhance the positive correlation between soil erosion vulnerability and intensity. 展开更多
关键词 Soil erosion vulnerability RUSLE model Combination weighting method Driving factors Spatial heterogeneity
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Engineering Geological Zoning of Soft-Soil Foundation Based on Combination Weighting and Extension Methods 认领 引用 被引量：1
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作者 孙明乾 王清 +4 位作者 陈剑平 李严 宋盛渊 鲍硕超 阮云凯 《Journal of Donghua University(English Edition)》 CAS 2016年第3期453-461,共9页
Different criteria and factors are used in different methods of soft soil foundation settlement calculation and engineering geological zoning.The methods used are not universally suitable for complex geological enviro... Different criteria and factors are used in different methods of soft soil foundation settlement calculation and engineering geological zoning.The methods used are not universally suitable for complex geological environments.The post-construction settlement of soft soil foundations are especially large and difficult to calculate.In addition,there are many deficiencies in the current methods used for engineering geological zoning.Focusing on the need of establishing engineering geological zoning for areas with soft soil foundations in the Tianjin Marine Economic Area,combination weighting and extension methods were introduced.An evaluation model for the settlement of soft soil foundations was established using multiple factors and large amounts of data.This evaluation model is accurate and objective for delineating engineering geological zoning.These methods eliminate deficiencies by considering both objective and subjective factors,and help obtain an objective and accurate result. 展开更多
关键词 soft soil foundation engineering geological zoning combination weighting method extension method
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COMBINATION METHOD FOR PARALLEL COMPUTATION IN ODE 认领 引用
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作者 宋晓秋 袁兆鼎 刘德贵 《Acta Mathematicae Applicatae Sinica》 1993年第1期44-49,共6页
In this paper,a 4th order parallel computation method with four processes for solving ODEs is discussed.This method is the Runge-Kutta method combined with a linear multistep method,which overcomes the difficulties of... In this paper,a 4th order parallel computation method with four processes for solving ODEs is discussed.This method is the Runge-Kutta method combined with a linear multistep method,which overcomes the difficulties of the 4th order parallel Runge-Kutta method discussed in [1].The concept of critical speedup for parallel methods is also defined,and speedups of some methods are analyzed by using this concept. 展开更多
关键词 COMBINATION METHOD FOR PARALLEL COMPUTATION IN ODE In
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Safety Evaluation Method for Long-Term Operation of Metro Based on Combination Weighting Method 认领 引用 被引量：2
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作者 CAO Weiwei LI Mingguang +2 位作者 WU Wei XIA Xiaohe SHI Yujin 《Journal of Shanghai Jiaotong university(Science)》 EI 2020年第6期700-705,共6页
Metros are critical infrastructure in big cities and evaluation of their safe operation is of increasing im-portance.To make a reasonable safety evaluation for the metro during operation,this paper establishes a ratio... Metros are critical infrastructure in big cities and evaluation of their safe operation is of increasing im-portance.To make a reasonable safety evaluation for the metro during operation,this paper establishes a rational safety evaluation model based on long-term monitoring data of Shanghai Metro Line 2.Four evaluation indicators,ie.,absolute settlement,relative curvature,deformation rate and curvature radius,are adopted.Analytic hierar-chy process(AHP)and entropy method are combined to determine the weights of the indicators.The risk level values at different mileage are calculated and five danger levels are defined accordingly to determine the safety state of Shanghai Metro Line 2,ie.,safe,relatively safe,critical,relatively dangerous,and dangerous.Safety evaluation of Shanghai Metro Line 2 shows that:83.81%areas of Shanghai Metro Line 2 are in safe,relatively safe and critical states,while 15.63%and 0.57%areas are in relatively dangerous and dangerous states,respectively;the parts of Shanghai Metro Line 2 where the risk level values exceed the critical value are mainly distributed around the mileage at 6.0-7.5km and 8.5-11.0 km,and the risk level value peaks around the mileage at 7.3km,to which much attention should be attached and relevant protective measures be taken;the sections with the high risk level values coincide with the distinctly deforming arcas of the metro,indicating that this evaluation method is valid. 展开更多
关键词 long-term deformation safety evaluation combination weighting method Shanghai Metro
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Research on Satellite Fault Diagnostics Technology Based on Combination of Several Methods 认领 引用 被引量：2
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作者 BAI Dongwei TANG Jungang PAN Xin 《Aerospace China》 2016年第1期30-36,共7页
According to the different types and characteristics of satellite fault,a kind of fault diagnosis method is proposed,which integrates multivariate threshold,model-based and fault tree-based method.In order to optimize... According to the different types and characteristics of satellite fault,a kind of fault diagnosis method is proposed,which integrates multivariate threshold,model-based and fault tree-based method.In order to optimize the fault diagnosis method,it takes the advantages and remedy of a defect with other methods.This can diagnose many kinds of satellite fault occurring in the on-orbit phase rapidly and accurately.Besides,it can analyze the damage degree of the failure and establish the measures to eliminate the failure. 展开更多
关键词 Combination of several methods Fault diagnosis
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Evaluation of NLLoc positioning method and seismogenic structure analysis of Luanzhou MS4.3 earthquake 认领 引用
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作者 Zhang Yang Wang Xiao-Shan +3 位作者 Chen Ting Lv Guo-Jun Yu Hai-lin Chen Jun-lin 《Applied Geophysics》 SCIE CSCD 2025年第3期729-738,894,895,共10页
NLLoc is a nonlinear search positioning method.In this study,we use simulated arrival time data to quantitatively evaluate the NLLoc method from three aspects:arrival time picking accuracy,station distribution,and vel... NLLoc is a nonlinear search positioning method.In this study,we use simulated arrival time data to quantitatively evaluate the NLLoc method from three aspects:arrival time picking accuracy,station distribution,and velocity model.The results show that the NLLoc method exhibits high positioning accuracy and stability in terms of arrival time picking accuracy and station distribution;however,it is sensitive to the velocity model.The positioning accuracy is higher when the velocity model is smaller than the true velocity.We combined absolute and relative positioning methods.First,we use the NLLoc method for absolute positioning of seismic data and then the double difference positioning method for relative positioning to obtain a more accurate relocation result.Furthermore,we used the combined method to locate the earthquake sequence after collecting dense seismic array data on the Luanzhou MS4.3 earthquake that occurred on April 16,2021,in Hebei Province.By fitting the fault plane with the relocated earthquake sequences,the results show that the strike and dip angles of the seismogenic fault of the Luanzhou MS4.3 earthquake are 208.5°and 85.6°,respectively.This indicates a high-dip angle fault with North-North-East strike and North-West dip directions.Furthermore,we infer that the seismogenic fault of the Luanzhou MS4.3 earthquake is the Lulong fault. 展开更多
关键词 NLLoc method Combined multiple positioning methods Luanzhou MS4.3 earthquake Seismogenic structure Lulong fault
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Application of combination weighting method in contract risk's evaluation of third party logistics 认领 引用 被引量：10
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作者 傅新平 邹敏 《Journal of Southeast University(English Edition)》 EI CAS 2007年第S1期128-132,共5页
First,the analytical hierarchy process(AHP),which stands for the subjective weighting method,and the entropy method,which stands for the objective weighting method,are chosen to calculate the index weights of the cont... First,the analytical hierarchy process(AHP),which stands for the subjective weighting method,and the entropy method,which stands for the objective weighting method,are chosen to calculate the index weights of the contract risks of third party logistics(TPL),respectively.Then,they can determine the combination weights using the combination weighting method.Second,using the combination weights,the contract risks of TPL are evaluated through the fuzzy comprehensive evaluation method.According to the combination weights,the most important risk factor of the contract risks of TPL is choosing sub-contractors.The results are basically consistent with the facts and show that the weights determined by the combination weighting method can avoid the man-made deviations of the subjective weighting method on the one hand,and prevent results opposite to the reality brought about by the objective weighting method on the other hand.Meanwhile,the results of the fuzzy comprehensive evaluation are that the contract risks of TPL are at a high risk level.Roughly this matches real situations,and it indicates that the combination weighting method can generate the comprehensive assessment more scientifically and more reasonably as well. 展开更多
关键词 analytical hierarchy process(AHP) entropy method combination weighting method contract risk
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Water quality assessment in a megacity river:Water chemical analysis integrated with AHP-Entropy weighted fuzzy comprehensive evaluation model 认领 引用 被引量：1
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作者 Jie Ren Guilin Han +1 位作者 Xi Gao Shitong Zhang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第4期121-130,共10页
Megacity rivers face growing pollution pressures from multiple anthropogenic sources, posing challenges to traditional water quality assessment methods. This study investigated the water chemistry of the Yongding Rive... Megacity rivers face growing pollution pressures from multiple anthropogenic sources, posing challenges to traditional water quality assessment methods. This study investigated the water chemistry of the Yongding River(YDR) and its controlling factors. A fuzzy comprehensive evaluation(FCE) model, integrated with Analytic Hierarchy Process(AHP) and Entropy weighting, was applied to assess water quality. The results classified water quality into five grades, with 82 % of samples falling within Grades Ⅰ to Ⅲ, indicating generally good conditions. Reservoir discharge significantly improved water quality in the Beijing urban section, while agricultural and domestic wastewater caused deterioration in Huailai and Tianjin. Compared with conventional irrigation assessment indices, the improved FCE model more effectively captures overall pollution status, and offers a robust framework for water quality evaluation in urban rivers impacted by complex natural and anthropogenic factors.The findings support sustainable management and ecological restoration of the YDR and demonstrate the broader applicability of the FCE model to other megacity rivers. 展开更多
关键词 Anthropogenic influence Combined weighting method Hydrochemical characteristics Multi-criteria decision analysis Megacity river
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An error analysis and optimization method for combined measurement with binocular vision 认领 引用 被引量：6
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作者 Yongkang LU Wei LIU +5 位作者 Yang ZHANG Junqing LI Weiqi LUO Yanze ZHANG Hongwen XINGb Lei ZHANG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2021年第10期282-292,共11页
The accurate measurement of surfaces of large aviation components is vital for the assessment of manufacturing and assembly quality of such components.To satisfy the measurement requirement of large-size components,mo... The accurate measurement of surfaces of large aviation components is vital for the assessment of manufacturing and assembly quality of such components.To satisfy the measurement requirement of large-size components,most current researches pay more attention to combined measurement methods utilizing different measuring instruments,but the related researches on error analysis and optimization methods are not taken enough attention.This paper proposes a combined laser-assisted measurement method with feature enhancement techniques,and it also develops an error propagation model of the main factors affecting the overall measurement error in detail.Firstly,the surface of a large-size component is measured by the measurement system at multiple stations.Secondly,a control point coordinate system is established as a bridge to unify all local measurement data into the global coordinate system.To improve the overall measurement accuracy,the pixel extraction error as a key factor causing the overall measurement error is analyzed in detail.Next,the error propagation model is established,and some optimization strategies of layout for minimizing measurement error and transformation error are researched.Finally,experiments are carried out to verify the effectiveness of the proposed method.The results show that the measurement error of the proposed method reaches 0.073%and 0.14%with a 1 D standard ruler and a flat plate,respectively. 展开更多
关键词 Aviation assembly Combined measurement method Error propagation Large-size aviation component Overall optimization
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The Testing Strength Curves of Lightweight Aggregate Concrete by Rebound Method and Ultrasonic-rebound Combined Method 认领 引用 被引量：3
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作者 RONG Hui QIAN Chunxiang +2 位作者 GAO Lixiong HAN Jiande WANG Caihui 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2011年第5期1010-1017,共8页
The strength curves of lightweight aggregate concrete(LWAC)were tested based on detecting LWAC with density of 1400-1900 kg/m3 and LWAC with strength grade of LC15-LC50 by rebound method and ultrasonic-rebound combine... The strength curves of lightweight aggregate concrete(LWAC)were tested based on detecting LWAC with density of 1400-1900 kg/m3 and LWAC with strength grade of LC15-LC50 by rebound method and ultrasonic-rebound combined method.The results show that the common measured strength curves tested by above two methods can not satisfy the required accuracy of LWAC strength test.In addition,specified compressive strength curves of testing LWAC by rebound method and ultrasonic-rebound combined method are obtained,respectively. 展开更多
关键词 lightweight aggregate concrete compressive strength rebound method testing-strength curve ultrasonic-rebound combined method
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Synthesis methods of functionalized nanoparticles:a review 认领 引用 被引量：5
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作者 Niyou Wang Jerry Ying Hsi Fuh +1 位作者 S.Thameem Dheen A.Senthil Kumar 《Bio-Design and Manufacturing》 SCIE EI CAS CSCD 2021年第2期379-404,共26页
With the recent advancement in nanotechnology,nanoparticles(NPs)offer an ample variety of smart functions than conventional materials in various aspects.As compared to larger particles,NPs possess unique characteristi... With the recent advancement in nanotechnology,nanoparticles(NPs)offer an ample variety of smart functions than conventional materials in various aspects.As compared to larger particles,NPs possess unique characteristics and excellent abilities,such as low toxicity,chemical stability,surface functionality,and biocompatibility.These advantageous properties allow them to be widely utilized in many applications,including biomedical applications,energy applications,IT applications,and industrial applications.In order to fulfill the increasing demands of NP applications,existing NP synthesis methods need to be improved based on the requirements of different applications to further their usage.A comprehensive understanding of the relationships between synthesis parameters and properties of NPs can help us better fine-tune them with designed properties and minimal toxicity.This review paper will discuss the commonly used synthesis methods of functionalized NPs,as well as future directions and challenges to develop various synthesis methods further. 展开更多
关键词 Nanoparticles Single synthesis methods Biosynthesis methods Combined synthesis methods Processing parameters
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Function Combined Method for Design Innovation of Children's Bike 认领 引用 被引量：4
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作者 WU Xiaoli QIU Tingting CHEN Huijuan 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2013年第2期242-247,共6页
As children mature, bike products for children in the market develop at the same time, and the conditions are frequently updated. Certain problems occur when using a bike, such as cycle overlapping, repeating function... As children mature, bike products for children in the market develop at the same time, and the conditions are frequently updated. Certain problems occur when using a bike, such as cycle overlapping, repeating function, and short life cycle, which go against the principles of energy conservation and the environmental protection intensive design concept. In this paper, a rational multi-function method of design through functional superposition, transformation, and technical implementation is proposed. An organic combination of frog-style scooter and children’s tricycle is developed using the multi-function method. From the ergonomic perspective, the paper elaborates on the body size of children aged 5 to 12 and effectively extracts data for a multi-function children’s bike, which can be used for gliding and riding. By inverting the body, parts can be interchanged between the handles and the pedals of the bike. Finally, the paper provides a detailed analysis of the components and structural design, body material, and processing technology of the bike. The study of Industrial Product Innovation Design provides an effective design method to solve the bicycle problems, extends the function problems, improves the product market situation, and enhances the energy saving feature while implementing intensive product development effectively at the same time. 展开更多
关键词 children’s bike function combined method ergonomics function transformed
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Numerical simulation on the seismic performance of retrofitted masonry walls based on the combined finite-discrete element method 认领 引用 被引量：3
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作者 Wu Biye Dai Junwu +2 位作者 Jin Huan Bai Wen Chen Bowen 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2023年第3期777-805,共29页
Due to the long construction life,improper design methods,brittle material properties and poor construction techniques,most existing masonry structures do not perform well during earthquakes.The retrofitting method us... Due to the long construction life,improper design methods,brittle material properties and poor construction techniques,most existing masonry structures do not perform well during earthquakes.The retrofitting method using an external steel-meshed mortar layer is widely used to retrofit existing masonry buildings.Assessing the seismic performance of masonry walls reinforced by an external steel-meshed mortar layer reasonably and effectively is a difficult subject in the research field of masonry structures.Based on the combined finite-discrete elements method,the numerical models of retrofitted brick walls with four different masonry mortar strengths by an external mortar layer are established.The shear strength of mortar and the contact between the retrofitted mortar layer and the brick blocks are discussed in detail.The failure patterns and load-displacement curves of the retrofitted brick walls were obtained by applying low cycle reciprocating loads to the numerical model,and the bearing capacity and the failure mechanism of the retrofitted walls were obtained by comparing the failure patterns,ultimate bearing capacity,deformability and other aspects with the tests.This study provides a basis for improving the seismic strengthening design method of masonry structures and helps to better assess the seismic performance of masonry structures after retrofitting. 展开更多
关键词 masonry wall external steel-meshed mortar layer combined finite-discrete element method hysteretic curve ultimate bearing capacity
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