摘要
确保结构安全是力学在工程应用中永远关心的问题,为此,综述了结构安全观念的进化过程,将其划分为5个阶段:其一、从材料的永驻安全到材料的常驻安全,这是观念的滥觞;其二,从材料的尽驻安全到构件的尽驻安全,这是观念的渐变;其三,从构件的尽驻安全到结构的破损-安全,这是观念的飞跃;其四,基于破损-安全的结构截面与形状优化,这是观念的叠加;其五,基于破损-安全的结构拓扑优化,这是观念的昇华。由于第五阶段是学者们在当前最关注的研究之一,对此着墨颇多,且举出了有代表性的理论和算例。接着,又在观念的启迪和观念本质上,进行了两方面的展开:其一,从基于破损-安全的结构分析和结构优化,讨论了观念的启迪,启迪1是,遵循破损-安全设计原则而不放弃安全-经济设计原则,启迪2是,沿袭超静定结构的感性设计经验上升到理性生成冗余区域的阶段;其二,从结构在役破损-安全的时间与空间剖析,讨论了观念的本质,并且给出了清晰的列表。
To ensure structural safety is the fundamental problem of mechanics in the engineering application.Therefore,the evolution of the concept of structural safety is summarized this paper,which is divided into five stages.First,from permanent safety of materials to long-term safety of materials,which is the origin of the concept.Second,from the utmost safety of materials to the utmost safety of components,which is the gradual change of the concept.Thirdly,from the utmost safety of the component to the fail-safe of the structure,which is a leap of the concept.Fourth,structural cross-section and shape optimization based on fail-safe,which is the assemble of the concept.Fifth,the structural topology optimization based on fail-safe is the sublimation of the concept.As the fifth stage is one of the most concerned researches by scholars at present,more literature materials on it are listed and representative theories and examples are presented in this paper.Then,in the enlightenment and essence of the concept,developments are carried out:First,from the view of the structural analysis and optimization based on fail-safe,the enlightenment of the concept is discussed.Enlightenment 1 is to follow the fail-safe design principle without abandoning the safe-economic design principle.Enlightenment 2 is to follow the experience-based design of statically indeterminate structure to the design stage of the rational generation of structural redundancy.Secondly,from the time and space analysis of structure on-service fail-safe,the essence of the concept is discussed and a clear list is given.
作者
隋允康
彭细荣
SUI Yunkang;PENG Xirong(Numerical Simulation Center for Engineering,Beijing University of Technology,100124 Beijing,China;Department of Civil Engineering,Hunan City University,413000 Yiyang,China)
出处
《应用力学学报》
CAS
CSCD
北大核心
2023年第6期1239-1248,共10页
Chinese Journal of Applied Mechanics
基金
国家自然科学基金资助项目(No.11672103)
湖南省教育厅重点项目(No.21A0507)
湖南省自然科学基金资助项目(No.2022JJ30113,2021JJ50145)
湖南省教育厅科学研究项目青年项目(No.19B106)。
关键词
结构分析和优化
结构安全观念
发展历程
基于破损-安全的结构拓扑优化
structural analysis and optimization
structural safety concept
development history
fail-safe topology optimization of structure
作者简介
通信作者:彭细荣,教授。E-mail:pxr568@163.com。
