structures:new solutions and uncommon characteristics James Kirby,Shiwei Zhou,

作     者：James Kirby Shiwei Zhou Yi Min Xie James Kirby;周世伟;谢亿民

作者机构：Centre for Innovative Structures and MaterialsSchool of EngineeringRMIT UniversityMelbourne 3001Australia 

基　　金：This work was supported by an Australian Government Research Training Program(RTP)Scholarship 

出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)

年 卷 期：2022年第38卷第6期

页      码：128-140,I0003页

摘      要：To investigate the characteristics of optimal fail-safe structures subjected to single and multi-member damage scenarios,we con-sider a pin-jointed cantilever truss with all members directly connected from the load point to the *** problem formu-lations are considered—minimizing the compliance with a volume constraint and minimizing the volume with stress *** these formulations produce equivalent structures for traditional truss design problems,we find that this is not always the case in the fail-safe *** solutions are developed for a three-bar truss under both problem *** is modelled as the complete removal of any one member,and a minmax problem is constructed to minimize the compliance or volume of the structure for the worst-case damage *** new analytical solutions provide much needed benchmarks for numerical fail-safe *** problems are extended to n-bar systems with damage to multiple *** show that as the structural complexity(the number of members in a system)increases,the optimum fail-safe structure tends towards a variation of the nominal two-bar design with overlapping *** these observations,we then approach the idea of full redundancy through the introduction of parallel substructures into a more complex truss *** compare our fully redundant truss design with a benchmark fail-safe solution and show that the fully redundant design has significantly better performance and with fewer ***,this suggests that fully redundant structural designs are highly efficient and have the additional benefit of only requiring the computation of the nominal solution.

主 题 词：Fail-safe optimization Minimum compliance Minimum volume, 

学科分类：08[工学] 080104[080104] 0815[工学-矿业类] 0801[工学-力学类] 

核心收录：

D　O　I：10.1007/s10409-022-09028-3

馆 藏 号：203112121...