Structural optimization of multibody system components described using level set techniques

Emmanuel Tromme, Daniel Tortorelli, Olivier Brüls, Pierre Duysinx

Research output: Contribution to journalArticlepeer-review


The structural optimization of the components in multibody systems is performed using a fully coupled optimization method. The design’s predicted response is obtained from a flexible multibody system simulation under various service conditions. In this way, the resulting optimization process enhances most existing studies which are limited to weakly coupled (quasi-) static or frequency domain loading conditions. A level set description of the component geometry is used to formulate a generalized shape optimization problem which is solved via efficient gradient-based optimization methods. Gradients of cost and constraint functions are obtained from a sensitivity analysis which is revisited in order to facilitate its implementation and retain its computational efficiency. The optimizations of a slider-crank mechanism and a 2-dof robot are provided to exemplify the procedure.

Original languageEnglish (US)
Pages (from-to)959-971
Number of pages13
JournalStructural and Multidisciplinary Optimization
Issue number5
StatePublished - Nov 1 2015


  • Dynamic response optimization
  • Flexible multibody systems
  • Generalized shape optimization
  • Level set description
  • Sensitivity analysis

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Software
  • Computer Science Applications
  • Computer Graphics and Computer-Aided Design
  • Control and Optimization


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