J4 ›› 2012, Vol. 39 ›› Issue (4): 149-154.doi: 10.3969/j.issn.1001-2400.2012.04.027

• Original Articles • Previous Articles     Next Articles

Structural topology optimization using a level-set method  based on structural fatigue reliability analysis

LIU Guoliang;CHEN Jianjun;MA Hongbo   

  1. (Ministry of Education Key Lab. of Electronic Equipment Structure, Xidian Univ., Xi'an  710071, China)
  • Received:2011-12-05 Online:2012-08-20 Published:2012-10-08
  • Contact: LIU Guoliang E-mail:luigl@126.com

Abstract:

Based on the stress-strength interference theory for the fatigue reliability of structural elements, the probability and non-probability fatigue reliability of elements are studied and a new topological optimization method is presented. This method combines with the level set method for structural topology optimization, takes the minimized structural flexibility as the objective function, and chooses the volume and fatigue reliability requirement as constraint functions. The constraints of fatigue reliability are processed explicitly before optimization, which simplifies the optimization course, avoids complicated iteration operations and raises the computing efficiency. The results of engineering examples indicate the validity and rationality of the proposed method.

Key words: fatigue, reliability, level set method, topological optimization

CLC Number: 

  • O342