首页 | 本学科首页   官方微博 | 高级检索  
     检索      

破损-安全拓扑优化的局部破损模式参数影响分析
引用本文:彭细荣,隋允康.破损-安全拓扑优化的局部破损模式参数影响分析[J].计算力学学报,2019,36(3):317-323.
作者姓名:彭细荣  隋允康
作者单位:湖南城市学院 土木工程学院, 益阳 413000,北京工业大学 工程数值模拟中心, 北京 100022
基金项目:国家自然科学基金(11672103);湖南省自然科学基金(2016JJ6016)资助项目.
摘    要:针对连续体结构,考虑破损-安全拓扑优化中如何处理结构局部破损的关键问题,以位移约束下结构体积极小化拓扑优化问题为例,基于独立连续映射ICM方法,建立了优化模型,给出了求解方法。以单荷载及多荷载工况的数值算例为例,探讨了结构局部破损模式的形状和大小及结构局部破损状况预估分布等对最优结构拓扑的影响。结果表明,(1)相比于不考虑破损-安全的结构拓扑优化,考虑破损-安全得到的最优拓扑具有更多冗余构件及传力路径;(2)不同形状及大小的结构局部破损模式会得到不同的最优结构拓扑;(3)结构局部破损模式布置间距越小,得到的最优拓扑越趋复杂。故在进行考虑破损-安全拓扑优化设计时,宜依据工程问题,合理定义结构局部破损模式的形状和大小及结构局部破损状况的预估分布等,以准确模拟实际结构的局部破损,得到具有适度冗余的最优拓扑。

关 键 词:连续体结构  拓扑优化  破损-安全  局部破损  ICM方法
收稿时间:2018/2/1 0:00:00
修稿时间:2018/4/7 0:00:00

Parameter effect analysis of local failure modes for fail-safe topology optimization
PENG Xi-rong,SUI Yun-kang.Parameter effect analysis of local failure modes for fail-safe topology optimization[J].Chinese Journal of Computational Mechanics,2019,36(3):317-323.
Authors:PENG Xi-rong  SUI Yun-kang
Institution:School of Civil Engineering, Hunan City University, Yiyang 413000, China and Numerical Simulation Centre for Engineering, Beijing University of Technology, Beijing 100022, China
Abstract:For the fail-safe topology optimization of continuum structures,aiming at the key problem of handling handle the local failure of a structure,a topology optimization model considering fail-safe is established and solved based on the independent continuous and mapping (ICM) method.The topology optimization problem minimizing structural volume with displacement constraints is taken as an example.The effects of the shape and size of the local failure mode and the pre-estimation distribution of structural failure cases on the optimal structure topology are discussed.Numerical examples with single-load cases and multiple-load cases are given.The following conclusions can be obtained.(1) Compared with the topology optimization without fail-safe,optimal topologies obtained by the fail-safe topology optimization have more redundant components and more paths transferring forces.(2) Optimal topologies are different while the shape and size of the local failure mode of structures changes.(3) optimal topology is more complex while the space between neighboring distributed failure modes decreases.Therefore,it is appropriate to define a reasonable shape and size of the failure mode and the pre-estimation distribution of structural failure cases based on engineering topology optimization problems considering the fail-safe design principle.The local structural failure should be simulated accurately to obtain the optimal topological with moderate redundancy.
Keywords:continuum structures  topology optimization  fail-safe  local failure  ICM method
点击此处可从《计算力学学报》浏览原始摘要信息
点击此处可从《计算力学学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号