We review recent research activities on structural reliability analysis,reliability-based design optimization(RBDO) and applications in complex engineering structural design.Several novel uncertainty propagation metho...We review recent research activities on structural reliability analysis,reliability-based design optimization(RBDO) and applications in complex engineering structural design.Several novel uncertainty propagation methods and reliability models,which are the basis of the reliability assessment,are given.In addition,recent developments on reliability evaluation and sensitivity analysis are highlighted as well as implementation strategies for RBDO.展开更多
A new type of thin-walled circular tubes(CTs),which is inspired by the bamboo with highly-efficient energy absorption(EA)capability,was proposed and designed for the potential application of the energy absorber of rai...A new type of thin-walled circular tubes(CTs),which is inspired by the bamboo with highly-efficient energy absorption(EA)capability,was proposed and designed for the potential application of the energy absorber of rail vehicles in this study.And then,the axial crushing behavior and crashworthiness of the bamboo-inspired bionic tube(BT)were experimentally and numerically investigated,compared with the single CT and foam-filled tube(FT).The typical crushing responses(e.g.,deformation mode,load-displacement response,energy absorption,and strain distribution)and quantitative crashworthiness indicators(EA,SEA,FP,Fm,and CFE)of these three types of CTs were presented and discussed.Effects of impact velocity and foam relative density on the crashworthiness of tested tubes were also explored.The experimental and simulation results show that the BT specimen exhibits the best capability of load-carrying,energy absorption,and crashworthiness among three types of tubes.Compared with the CT specimen,the EA value of BT specimens increased by 93.1%,while the corresponding Fm value raised from 74.2 kN to 143.4 kN.展开更多
基金supported by the Defense Industrial Technology Development Program (Grant Nos.A2120110001 and B2120110011)111 Project (Grant No.B07009)the National Natural Science Foundation of China (Grant Nos.11002013,90816024 and 10876100)
文摘We review recent research activities on structural reliability analysis,reliability-based design optimization(RBDO) and applications in complex engineering structural design.Several novel uncertainty propagation methods and reliability models,which are the basis of the reliability assessment,are given.In addition,recent developments on reliability evaluation and sensitivity analysis are highlighted as well as implementation strategies for RBDO.
基金This work was supported by the National Natural Science Foundation of China(Grant No.12122211).
文摘A new type of thin-walled circular tubes(CTs),which is inspired by the bamboo with highly-efficient energy absorption(EA)capability,was proposed and designed for the potential application of the energy absorber of rail vehicles in this study.And then,the axial crushing behavior and crashworthiness of the bamboo-inspired bionic tube(BT)were experimentally and numerically investigated,compared with the single CT and foam-filled tube(FT).The typical crushing responses(e.g.,deformation mode,load-displacement response,energy absorption,and strain distribution)and quantitative crashworthiness indicators(EA,SEA,FP,Fm,and CFE)of these three types of CTs were presented and discussed.Effects of impact velocity and foam relative density on the crashworthiness of tested tubes were also explored.The experimental and simulation results show that the BT specimen exhibits the best capability of load-carrying,energy absorption,and crashworthiness among three types of tubes.Compared with the CT specimen,the EA value of BT specimens increased by 93.1%,while the corresponding Fm value raised from 74.2 kN to 143.4 kN.
