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工程设计学报  2022, Vol. 29 Issue (3): 279-285    DOI: 10.3785/j.issn.1006-754X.2022.00.039
设计理论与方法     
连续体结构的变密度拓扑优化方法研究
王景良1(),朱天成2,朱龙彪3,许飞云4
1.江苏海事职业技术学院 轮机电气与智能工程学院,江苏 南京 211100
2.中国联合网络通信集团有限公司 江苏省分公司,江苏 南京 211100
3.南通大学 机械工程学院,江苏 南通 226019
4.东南大学 机械工程学院,江苏 南京 211100
Research on variable density topology optimization method for continuum structure
Jing-liang WANG1(),Tian-cheng ZHU2,Long-biao ZHU3,Fei-yun XU4
1.School of Marine Electrical and Intelligent Engineering, Jiangsu Maritime Vocational Institute, Nanjing 211100, China
2.Jiangsu Branch, China United Network Communications Group Co. , Ltd. , Nanjing 211100, China
3.School of Mechanical Engineering, Nantong University, Nantong 226019, China
4.School of Mechanical Engineering, Southeast University, Nanjing 211100, China
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摘要:

为了实现使连续体结构的体积约束和柔顺度最小的拓扑优化及解决采用经典变密度法引起的结构优化结果存在如灰度单元、棋盘格等数值不稳定问题,提出了一种新的拓扑优化方法。首先,采用改进的固体各向同性材料惩罚法作为材料插值方案,建立结构拓扑优化模型;其次,通过引入基于高斯权重函数的敏度过滤法和设计新灰度单元抑制算子来解决数值不稳定问题;最后,借助优化准则法求解优化模型。通过算例分析可知:新策略可以改进拓扑优化方法;新的拓扑优化方法具有收敛速度较快、能更好地获取柔顺度小且拓扑构型好的优化结构和抑制灰度单元产生等优势。研究结果为其他连续体结构的拓扑优化研究提供了新思路。

关键词: 连续体结构拓扑优化方法固体各向同性材料惩罚法敏度过滤法灰度单元抑制算子    
Abstract:

In order to achieve the topological optimization of the volume constraint and the minimum compliance of the continuous structure and solve the numerical instability problems, such as gray-scale element and checkerboard grid caused by classical variable density method, a new topology optimization method was proposed. Firstly, the method of improved solid isotropic material with penalization was used as the material interpolation scheme to establish a structural topology optimization model;secondly, the numerical instability problem was solved by introducing sensitivity filtering method based on the Gaussian weight function and designing a new gray-scale element suppression operator; finally, the optimization model was solved by the optimality criterion method. Through example analysis, it could be seen that the new strategy could improve the topology optimization method. The method had the advantages of faster convergence, acquisition of optimized structures with small compliance and good topological configuration and better suppression of gray-scale element generation. The results provide new ideas for the study of topological optimization of other continuum structures.

Key words: continuum structure    topology optimization method    method of solid isotropic materials    with penalization sensitivity filtration method    gray-scale element suppression operator
收稿日期: 2021-08-08 出版日期: 2022-07-05
CLC:  TH 122  
基金资助: 国家自然科学基金资助项目(51975117)
作者简介: 王景良(1988—),女,江苏盐城人,讲师,硕士,从事结构设计与优化、机电控制与图像处理等研究,E-mail:wangjingliang8803@126.comhttps://orcid.org/0000-0002-4698-9120
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引用本文:

王景良,朱天成,朱龙彪,许飞云. 连续体结构的变密度拓扑优化方法研究[J]. 工程设计学报, 2022, 29(3): 279-285.

Jing-liang WANG,Tian-cheng ZHU,Long-biao ZHU,Fei-yun XU. Research on variable density topology optimization method for continuum structure[J]. Chinese Journal of Engineering Design, 2022, 29(3): 279-285.

链接本文:

https://www.zjujournals.com/gcsjxb/CN/10.3785/j.issn.1006-754X.2022.00.039        https://www.zjujournals.com/gcsjxb/CN/Y2022/V29/I3/279

图1  MBB梁结构
图2  不同SIMP法下MBB梁结构的拓扑构型
SIMP法c/(N·mm)I/次G/ %
文献[18]方法213.008326.66
本文方法208.546430.34
表1  不同SIMP法下MBB梁结构优化结果
图3  不同敏度过滤法下MBB梁结构的拓扑构型
敏度过滤法c/(N·mm)I/次G / %
文献[18] 方法208.546430.34
本文方法205.836427.23
表2  不同敏度过滤法下MBB梁结构优化结果
图4  不同灰度单元抑制算子下MBB梁结构的拓扑构型
灰度单元抑制算子c/(N·mm)I/次G / %
文献[18] 方法205.836427.23
本文方法196.65353.89
表3  不同灰度单元抑制算子下MBB梁结构优化结果
图5  不同拓扑优化方法下MBB梁结构的拓扑构型
拓扑优化方法c/(N·mm)I/次G/ %
文献[14] 方法211.767224.27
文献[18] 方法213.008326.66
本文方法196.65353.89
表4  不同拓扑优化方法下MBB梁结构优化结果
图6  悬臂梁结构
图7  不同拓扑优化方法下悬臂梁结构的拓扑构型
拓扑优化方法c/(N·mm)I/次G/ %
文献[14] 方法114.9011824.77
文献[18] 方法115.2316726.75
本文方法104.98384.73
表5  不同拓扑优化方法下悬臂梁结构优化结果
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