首页 | 本学科首页   官方微博 | 高级检索  
     

基于对比度增强抑制灰度的改进优化准则法
引用本文:许小奎,郭宝峰,金淼. 基于对比度增强抑制灰度的改进优化准则法[J]. 中国机械工程, 2017, 28(24): 2944
作者姓名:许小奎  郭宝峰  金淼
作者单位:燕山大学先进锻压成形技术与科学教育部重点实验室,秦皇岛,066004
基金项目:国家自然科学基金资助项目(51575474);河北省自然科学基金资助项目(E2015203220)National Natural Science Foundation of China (No. 51575474)Hebei Provincial Natural Science Foundation of China (No. E2015203220)
摘    要:为了抑制变密度法拓扑优化结果中的灰度单元,基于对比度增强策略,提出了两种形式的对比度增强算子,引入到优化准则法迭代计算中,对优化准则法进行了改进。对比度增强算子能够拉大单元灰度差别,驱动中间密度向两极进行分化,最终使优化收敛于0/1材料分布状态。采用典型数值算例对该方法进行了验证,计算结果表明,该方法能够得到拓扑结构清晰的优化结果。

关 键 词:拓扑优化  对比度增强  灰度单元  优化准则法  

A Modified Optimality Criterion Method Based on Contrast Enhancement for Gray Scale Suppression
XU Xiaokui,GUO Baofeng,JIN Miao. A Modified Optimality Criterion Method Based on Contrast Enhancement for Gray Scale Suppression[J]. China Mechanical Engineering, 2017, 28(24): 2944
Authors:XU Xiaokui  GUO Baofeng  JIN Miao
Affiliation:Key Laboratory of Advanced Forging & Stamping Technology and Science,Yanshan University,Qinhuangdao,Hebei,066004
Abstract:In order to suppress gray scale elements in density-based topology optimization, two kinds of contrast enhancement operators were proposed based on contrast enhancement strategy and introduced into the iterative calculation to modify the optimality criteria method. The contrast enhancement operator might enlarge the gray scale differences of the elements, drive the intermediate densities to the two ends of the range, and finally make the results convergence to the 0/1 material distribution. The effects of the proposed method were investigated with classical numerical examples. The results show that the optimization results with crisp boundaries are obtained by applying the proposed method.
Keywords:topology optimization  contrast enhancement  gray element  optimality criteria method  
本文献已被 CNKI 等数据库收录!
点击此处可从《中国机械工程》浏览原始摘要信息
点击此处可从《中国机械工程》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号