|
个人信息Personal Information
教授
博士生导师
硕士生导师
任职 : 工业装备结构分析优化与CAE软件全国重点实验室主任、结构优化理论与应用国际联合研究中心主任
性别：男
毕业院校：大连理工大学
学位：博士
所在单位：力学与航空航天学院
学科：工程力学. 计算力学. 结构工程. 车辆工程
办公地点：力学楼302
联系方式：0411-84707267 ligang@dlut.edu.cn
电子邮箱：ligang@dlut.edu.cn
Hybrid optimization of hierarchical stiffened shells based on smeared stiffener method and finite element method
点击次数：
论文类型：期刊论文
发表时间：2014-09-01
发表刊物：THIN-WALLED STRUCTURES
收录刊物：SCIE、EI
卷号：82
页面范围：46-54
ISSN号：0263-8231
关键字：Hierarchical stiffened shell; Axial compression; Buckling; Imperfection sensitivity; Hybrid optimization
摘要：In this study, Smeared Stiffener Method (SSM) of hierarchical stiffened shells is derived to release the prediction burden of buckling loads. Then, a minimum-weight optimization formulation for hierarchical stiffened shells is developed based on SSM, attempting to demonstrate the higher lightweight potential of hierarchical stiffened shells compared to the traditional ones. Further, the main aim of this paper is to present a hybrid optimization framework of hierarchical stiffened shells including imperfection sensitivity, combining the efficiency of SSM with the accuracy of FEM, since there are currently no closed-form solutions to take imperfections into account accurately. The illustrative example demonstrates that the proposed framework has a higher optimization efficiency and global optimization capability compared to the conventional methods. (C) 2014 Elsevier Ltd. All rights reserved.