Mixed reliability-oriented topology optimization for thermo-mechanical structures with multi-source uncertainties


Meng Z., Guo L., YILDIZ A. R. , Wang X.

ENGINEERING WITH COMPUTERS, 2022 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Publication Date: 2022
  • Doi Number: 10.1007/s00366-022-01662-1
  • Title of Journal : ENGINEERING WITH COMPUTERS
  • Keywords: Reliability-based topology optimization, Coupled thermo-mechanical problem, Multi-source uncertainties, Fuzzy, Probabilistic, LEVEL SET METHOD, DESIGN OPTIMIZATION, CONTINUUM STRUCTURES, INTERVAL, NRBTO, MODEL

Abstract

With the rapid development of topology optimization methodology in engineering application, how to deal with the multi-source uncertainties incurs more and more attention. In this study, an efficient single-loop method is proposed for reliability-based topology optimization (RBTO) of coupled thermo-mechanical continuum structure under multi-source uncertainties. To this end, a novel coupled thermo-mechanical RBTO model composed of triple-nested loops is first constructed based on fuzzy and probability theories, which aims to deal with the multi-source uncertainty factors, such as temperature rise fluctuation, thermal load variation, material property uncertainty, and manufacture tolerance. Second, a new mixed RBTO approach with single-loop is adopted to eliminate the nested triple loops, which aims to promote computational efficiency. Finally, the effectiveness and high performance of the proposed method are validated through a cantilever beam, clamped beam, and three-dimensional structure.