Optimal design of electro-thermo-mechanical microactuators considering minimum length scale constraints

IF 1.8 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Jinqing Zhan, Jiakun Yan, Benliang Zhu, Min Liu
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引用次数: 0

Abstract

To ensure the manufacturability of compliant mechanisms, this paper presents a new approach for optimal design of electro-thermo-mechanical microactuators by employing minimum length scale constraints. A sequential coupling method is adopted to carry out finite element analysis for electric-thermal-mechanical coupling multiphysics. The inflection point fields of the solid and void phases are identified by structural indicator functions. The minimum length scales of the solid and void phases are adopted as constraints. The optimization objective is designed to maximize the output displacements of electro-thermo-mechanical microactuators. The validity of the proposed optimal design method is demonstrated through several numerical examples. In the optimal designs obtained by the proposed method, the minimum length scales of the two phases can be properly controlled. The electro-thermo-mechanical microactuator’s output displacements decrease when the allowable value of the minimum length scale is increased. The effects of different mesh discretizations and output spring stiffnesses on the optimized designs are discussed.
考虑最小长度尺度约束条件的电动热液机械微型致动器优化设计
为确保顺应机构的可制造性,本文提出了一种新方法,通过采用最小长度尺度约束来优化电热机械微型致动器的设计。本文采用顺序耦合法对电-热-机耦合多物理场进行有限元分析。通过结构指示函数确定了固相和空相的拐点场。采用固相和空相的最小长度尺度作为约束条件。优化目标设计为最大化电热机械微型致动器的输出位移。通过几个数值示例证明了所提出的优化设计方法的有效性。在通过所提方法获得的优化设计中,两相的最小长度尺度可以得到适当控制。当最小长度尺度的允许值增大时,电动热液机械微型致动器的输出位移会减小。讨论了不同网格离散度和输出弹簧刚度对优化设计的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.80
自引率
10.00%
发文量
625
审稿时长
4.3 months
期刊介绍: The Journal of Mechanical Engineering Science advances the understanding of both the fundamentals of engineering science and its application to the solution of challenges and problems in engineering.
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