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International Conference on Fuzzy Systems and Knowledge Discovery (FSKD)

作者： Wenfeng Luo Ling Yu Department of Mechanics and Civil Engineering Jinan University Guangzhou China MOE Key Lab of Disaster Forecast and Control in Engineering Jinan University Guangzhou China

ISBN: (纸本)9781509040940

In this study, the finite element (FE) model updating method and particle swarm optimization (PSO) algorithm are combined to identify joint equivalent parameters by converting the inverse problem into an optimization problem. First, the natural frequency and frequency response function (FRF) of assembled structures are regarded as an index of the dynamic characteristics. The objective function is defined by minimizing index relative errors between FE model and assembled structures. And then the PSO algorithm is used to solve the optimization problem. The noise effect on the method is also considered. The illustrated numerical simulation results show that the proposed method can identify the equivalent parameters with a good robustness to noises as well as with a high efficiency.

关键词： Fasteners Linear programming Mathematical model Heuristic algorithms Computational modeling Algorithm design and analysis Damping

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Microscale Silicon Origami

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SMALL 2016年第39期12卷 5401-5406页

作者： Song, Zeming Lv, Cheng Liang, Mengbing Sanphuang, Varittha Wu, Kedi Chen, Bin Zhao, Zhi Bai, Jing Wang, Xu Volakis, John L. Wang, Liping He, Ximin Yao, Yu Tongay, Sefaattin Jiang, Hanqing Arizona State Univ Sch Engn Matter Transport & Energy Tempe AZ 85287 USA Arizona State Univ Sch Elect Comp & Energy Engn Tempe AZ 85287 USA Ohio State Univ Dept Elect & Comp Engn Electrosci Lab Columbus OH 43212 USA Jinan Univ MOE Key Lab Disaster Forecast & Control Engn Guangzhou 510632 Guangdong Peoples R China

A new methodology to create 3D origami patterns out of Si nanomembranes using pre-stretched and pre-patterned polydimethylsiloxane substrates is reported. It is shown this approach is able to mimic paper-based origami patterns. The combination of origami-based microscale 3D architectures and stretchable devices will lead to a breakthrough on reconfi gurable systems.

关键词： origami PDMS reconfigurable antenna silicon nanomambranes

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INTERFACIAL BEHAVIOR OF PIPE JOINTS UNDER TORSION LOADS

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Acta Mechanica Solida Sinica 2015年第5期28卷 521-535页

作者： Jun Han Hong Yuan Jiayu Wu MOE Key Lab of Disaster and Control in Engineering Institute of Applied Mechanics Jinan University

The interfacial behavior of pipe joints is studied in this paper. Firstly, through nonlinear fracture mechanics, the analytical expressions of interfacial shear stress and the load- displacement relationship at loaded end of pipe joints under torsion loads are obtained. Thus the shear stress propagation and the debonding process of the whole interface for different bond lengths can be predicted. Secondly, through the analytical solutions, the influences of different bond lengths on the load-displacement curve and the ultimate load are studied. The stress trans- fer mechanism, the interface crack propagation and the ductility behavior of the joints can be explained.

关键词： interface failure mechanism softening debonding torsion pipe joints

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Research on the performance-based parameter of horizontal visor of certain wall relative to the sun zenith angle

International Journal of Multimedia and Ubiquitous Engineeri...

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International Journal of Multimedia and Ubiquitous engineering 2016年第4期11卷 267-276页

作者： Gao, Jian Tang, Jian Key Lab of Disaster Forecast and Control in Engineering Ministry of Education of the People’s Republic of China Jinan University China

The horizontal shading is one part of the buildings, outside shading systems. Relative sun elevation angle to the wall, and relative sun azimuthal angle to the wall γ are introduced. The optimum width for the southern shading of local buildings can be calculated according to the law of solar altitude change over time. In this research, relative sun elevation angle to the wallis key for design parameters determination of horizontal shading component. The present study optimized the design of the horizontal shading on the basis of the traditional design. The new design of the visor could still shade the exceeding sunlight in summer, but at the same time allow enough sunshine in winter. This design is environmental-friendly, energy and material-saving. © 2016 SERSC.

关键词： Walls (structural partitions)

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Analysis of the key points for increasing passenger traffic efficiencies based on measurements of traffic through ticket gates in 3 cities

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International Journal of Simulation: Systems, Science and Technology 2016年第24期17卷

作者： Tang, Jian Key Lab of Disaster Forecast and Control in Engineering Ministry of Education of the People’s Republic of China Jinan University GuangzhouGuangdong China

By 2012, the passenger traffic capacity for rail transport in Guangzhou reached the highest level of all the cities in China. A questionnaire survey of commuters revealed that 42% of those interviewed in Guangzhou thought the ticket Automatic Gate Machine (AGM) was the most time-consuming aspect of the rail transport system, and its capacity could not meet commuter demand. Therefore, this research focused on the ticket gate machine and its effect on passenger traffic. In addition, concentrating on the sensor area of the ticket gate machine and investigating the machines in Guangzhou, Shenzhen and Hong Kong regions, the optimized key points for increasing passenger traffic efficiencies were found. These were whether the sensor areas lay flat or oblique and whether raised or not, and the color design of the sensor area. © 2016, UK Simulation Society. All rights reserved.

关键词： Efficiency

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Shearing characteristics of slip zone soils and strain localization analysis of a landslide

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GEOMECHANICS AND engineering 2015年第1期8卷 33-52页

作者： Liu, Dong Chen, Xiaoping Jinan Univ Coll Sci & Engn MOE Key Lab Disaster Forecast & Control Engn Guangzhou 510632 Guangdong Peoples R China

Based on the Mohr-Coulomb failure criterion, a gradient-dependent plastic model that considers the strain-softening behavior is presented in this study. Both triaxial shear tests on conventional specimen and precut-specimen, which were obtained from an ancient landslide, are performed to plot the post-peak stress-strain entire-process curves. According to the test results of the soil strength, which reduces from peak to residual strength, the Mohr-Coulomb criterion that considers strain-softening under gradient plastic theory is deduced, where strength reduction depends on the hardening parameter and the Laplacian thereof. The validity of the model is evaluated by the simulation of the results of triaxial shear test, and the computed and measured curves are consistent and independent of the adopted mesh. Finally, a progressive failure of the ancient landslide, which was triggered by slide of the toe, is simulated using this model, and the effects of the strain-softening process on the landslide stability are discussed.

关键词： gradient plastic theory triaxial shear test landslide strain localization progressive failure

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Fiber pullout with stress transfer and fracture propagation

Fiber pullout with stress transfer and fracture propagation

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International Conference on Industrial, Mechanical and Manufacturing Science, ICIMMS 2014

作者： Wu, J.Y. Yuan, H. Gu, H.W. MOE Key Laboratory of Disaster Forecast and Control in Engineering Institute of Applied Mechanics Jinan University Guangzhou China

ISBN: (纸本)9781138026568

In this paper, a nonlinear fracture mechanics approach has been introduced to derive theoretical solutions for the shear stress transfer and crack propagation along the interface of the pull-pull and pull-push fiber-matrix pullout model by using the assumed bilinear local bond-slip model. Expressions for the maximum load, shear stress and crack propagation along fiber-matrix interface are derived analytically. Finally, numerical simulations are conducted to discuss the factors influencing the interfacial behavior. Though this paper emphasizes on fiber-matrix pullout test, the analytical solution is equally applicable to similar test between spindly bars of other materials and concrete. © 2015 Taylor & Francis Group, London.

关键词： Shear stress

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Fracture failure analysis of Fiber Reinforced Composites T-joints

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IOP Conference Series: Materials Science and engineering 2017年第1期207卷

作者： Wei Su De-zhi Kong Ren-huai Liu Shi-qing Huang Science and Technology on Reliability Physics and Application Technology of Electronic Component Laboratory China Electronic Product Reliability and Environmental Testing Research Institute Guangzhou China MOE Key Lab of Disaster Forecast and Control in Engineering Jinan University Guangzhou China Department of Mechanics and Civil Engineering Jinan University Guangzhou China

This paper discusses staple FRP T-joints on the project based on the classical beam theory of Euler-Bernoulli and a theoretical model of energy release rate is set up to discuss fracture propagation of composite T-joints. The paper is further analysis on fracture failure affected by composite pane depth and joints chamfer dimension parameters and so on. The conclusion benefit for extensive use of projects is also summarized.

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Mechanical Deformation Mechanism of Fiber Reinforced Composites T-joints

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IOP Conference Series: Materials Science and engineering 2017年第1期207卷

作者： Wei Su Ke-qiang Cheng Ren-huai Liu Shi-qing Huang Science and Technology on Reliability Physics and Application Technology of Electronic Component Laboratory China Electronic Product Reliability and Environmental Testing Research Institute Guangzhou China MOE Key Lab of Disaster Forecast and Control in Engineering Jinan University Guangzhou China Department of Mechanics and Civil Engineering Jinan University Guangzhou China

In this paper, we focus on the need for ideal theory analytical solution of mechanical deformation mechanism for T-joints. Through removing unnecessary constraints, stress equivalence system of T-joints can be established by force method. Solution equations of unknown nodal forces and the total vertical displacement can also be obtained, and this result can be used to evaluate strength of FRC T-joints.

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An improved PSO-NM algorithm for structural damage detection 6th

An improved PSO-NM algorithm for structural damage detection

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6th International Conference on Swarm Intelligence, ICSI 2015 held in conjunction with the 2nd BRICS Congress on Computational Intelligence, CCI 2015

作者： Chen, Zepeng Yu, Ling Department of Mechanics and Civil Engineering Jinan University Guangzhou510632 China MOE Key Lab of Disaster Forecast and Control In Engineering Jinan University Guangzhou510632 China

ISBN: (纸本)9783319204659

A hybrid particle swarm optimization (PSO) combined with an improved Nelder-Mead algorithm (NMA) is proposed and introduced into the field of structural damage detection (SDD). The improved NMA chooses parts of subplanes of the n-simplex for optimization, a two-step method uses modal strain energy based index (MSEBI) to locate damage firstly, and both of them can reduce the computational cost of the basic PSO-Nelder-Mead (PSO-NM). An index of solution assurance criteria (SAC) is defined to describe the correlation between the identified and actual damage of structures. Numerical simulations on a 2-storey frame model is adopted to assess the performance of the proposed hybrid method. The illustrated results show that the improved PSONM can provide a reliable tool for accurate SDD in both single and multiple damage cases. Meanwhile, the improved PSO-NM algorithm has a good robustness to noises contaminated in mode shapes. © Springer International Publishing Switzerland 2015.

关键词： Strain energy

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