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论文类型：期刊论文

发表时间：2016-07-01

发表刊物：COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING

收录刊物：SCIE、EI

卷号：306

页面范围：299-318

ISSN号：0045-7825

关键字：Topology optimization; Level set; Integrated design; Embedded component; Minimum distance control; Virtual boundary offset

摘要：This paper presents a novel topology optimization method for designing structures with multiphase embedded components under minimum distance constraints in the level set framework. By using the level set representation for both the component layout and the host structure topology, the shapes of the components can be easily preserved, and optimal structural topologies with smooth boundary/material interface can be obtained. With the purpose of preventing the components moving too close to each other, a minimum distance constraint based on virtual boundary offset is proposed. Different from existing distance detection methods relying on explicit topology representation, the proposed constraint is imposed as a unified integral form, for which the design sensitivity can be readily obtained. Moreover, this constraint is effective for detecting the distance between any complex-shaped components. Several numerical examples are presented to demonstrate the validity and effectiveness of the proposed method. (C) 2016 Elsevier B.V. All rights reserved.