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

報告人：孫加亮 講師（航空學(xué)院航空航天交叉研究院）

時間：2019年11月21日（周四）下午2：30

地點：明故宮校區(qū)A18-209會議室

主辦單位：科協(xié)、航空學(xué)院、航空航天交叉研究院

報告內(nèi)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.

報告人簡介：

    孫加亮，南京航空航天大學(xué)航空學(xué)院講師，工學(xué)博士。2019年3月博士畢業(yè)于南京航空航天大學(xué)，同年6月入職航空航天交叉研究院。2017年9月至2018年9月，在丹麥技術(shù)大學(xué)訪問一年。目前主要從事多柔體系統(tǒng)動力學(xué)、可展開空間結(jié)構(gòu)動力學(xué)建模與優(yōu)化設(shè)計等研究，在大變形非線性計算、動力學(xué)拓?fù)鋬?yōu)化等方面發(fā)表論文10余篇，其中SCI期刊論文7篇。