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阎军

Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates


Main positions:Deputy director of the Department of Engineering Mechanics
Gender:Male
Alma Mater:Dalian University of Technology
Degree:Doctoral Degree
School/Department:Engineering Mechanics
Discipline:Engineering Mechanics. Computational Mechanics. Solid Mechanics. Aerospace Mechanics and Engineering. Design and Manufacture of Ship and Ocean Structure
Business Address:Room 305, Engineering Mechanics Department Building
Contact Information:0411-84706832
E-Mail:yanjun@dlut.edu.cn
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Current position: Home >> Scientific Research >> Paper Publications

频带约束下刚架结构优化问题可行域研究

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Indexed by:期刊论文

Date of Publication:2014-07-23

Journal:大连理工大学学报

Included Journals:PKU、ISTIC、CSCD、Scopus

Volume:54

Issue:4

Page Number:384-390

ISSN No.:1000-8608

Key Words:奇异性;优化;可行域;W-W算法

Abstract:研究频带约束下刚架结构轻量化设计问题的可行域基本性质。刚架结构中梁的断面积取为设计变量,采用欧拉-伯努利梁的动力刚度法及 W-W 算法精确求解结构的固有频率值。利用 W-W算法的特征值计数原理,研究了前述优化问题的可行域的形状和联通性,发现可行域呈现复杂的形状,由多块非联通子域组成,并且部分可行域子域可以是低维的。还以三杆梁的尺寸优化和拓扑优化为例,给出了可行域的具体形状,展示了这一优化问题的可行域具有“强奇异性”。可行域的这一特点给基于梯度类的优化算法带来了极大的困难,需要采用其他手段处理,也使这类问题有望用于测试各类优化软件算法。