【航宇大讲堂】Simultaneous topology and size optimization of 3D variable-length structures

作者:时间:2019-11-18浏览:568供图:审阅:来源:乐投Letou

字体:

题目:Simultaneous topology and size optimization of 3D variable-length structures

报告人:孙加亮 讲师(航空学院航空航天交叉研究院)

时间:20191121日(周四)下午230

所在:明故宫校区A18-209集会室

主办单位:科协、航空学院、航空航天交叉研究院

报告内容摘要:

    An efficient optimization approach is proposed to simultaneously optimize the topology and geometrical sizes of a 3D variable-length structure. First of all, in a unified global coordinate system, a flexible multibody system model is established to describe the extension and contraction dynamics of a variable-length structure. The variable-length flexible structure is meshed by the proposed arbitrary Lagrangian–Eulerian (ALE) solid elements of absolute nodal coordinate formulation (ANCF). To consider the variable-length behaviors, the classic equivalent static loads (ESL) is redefined by introducing the concept of virtual design domain. With the help of the ESL, the dynamic response optimization of the variable-length structure is turned into a static one. A simultaneous topology and size optimization approach is initially proposed via the moving morphable components. By appropriately arranging the initial configuration of the components and linking all or part of the design variables of a component with others’, the variable-length structure can be designed as a homogeneous or heterogeneous periodic structure. The approach is numerically implemented via an additional constraint that modifies the sensitivities with respect to some design variables. Finally, a few numerical examples are presented to demonstrate the effectiveness and efficiency of the proposed optimization approach.

报告人简介:

    孙加亮,乐投Letou航空学院讲师,工学博士。20193月博士结业于乐投Letou,同年6月入职航空航天交叉研究院。20179月至20189月,在丹麦技术大学会见一年。目前主要从事多柔体系统动力学、可展开空间结构动力学建模与优化设计等研究,在大变形非线性盘算、动力学拓扑优化等方面宣布论文10余篇,其中SCI期刊论文7篇。


sitemap网站地图