English
中文
Home
Scientific Research
Research Projects
Published Books
Patents
Paper Publications
Research Field
Teaching Research
Teaching Achievement
Teaching Information
Teaching Resources
Awards and Honours
Other Rewards
Academic Honor
Scientific Awards
Enrollment Information
Student Information
My Album
Blog
More
Current position:
Home
>>
Scientific Research
>>
Paper Publications
>> 基于离散变量的拓扑优化方法
Paper Publications
基于离散变量的拓扑优化方法
Hits:
Release time:2019-03-10
Title of Paper:
基于离散变量的拓扑优化方法
Indexed by:
期刊论文
Date of Publication:
2007-06-15
Journal:
应用数学和力学
Included Journals:
PKU、ISTIC、CSCD
Volume:
28
Issue:
6
Page Number:
631-642
ISSN No.:
1000-0887
Key Words:
离散变量;拓扑优化;敏度分析;矩阵摄动
Abstract:
单元敏度的不准确估计是离散拓扑优化算法数值不稳定的原因之一,特别是添加材料时,传统的敏度计算公式给出的估计误差较大,甚至有时估计符号都是错误的.为了克服这一问题,通过对弹性平衡增量方程的摄动分析构造了新的增量敏度估计公式.这一新的公式无论是添加材料还是删除材料都能较准确地估计出目标函数增量,它可以看作是通过非局部单元刚度阵对传统敏度分析公式的修正.以此为基础构建了一种基于离散变量的拓扑优化算法,它可以从任意单元上添加或删除材料以使目标函数减小,同时为避免优化过程中重新划分网格,采用了单元软杀策略以小刚度材料模拟空单元.这一方法的主要优点是简单,不需要太多的数学计算,特别有利于工程实际的应用.
Pre One:
]A feature-based topological optimization for structure design
Next One:
A simple discrete topology optimization method based on non-local element sensitivity analysis