Global structural optimization of 3d models based on modal analysis

Yuan Liu, Xuefeng Liu, Jiansong Deng, Zhouwang Yang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Traditional structural optimization methods require predefined load conditions. The resulting structure is optimal under the given condition, but can be weak under different loads. Objects can suffer from various forces in practical applications. The overall performance of objects cannot be guaranteed and thus more material than actually needed is used. In this work we propose a novel approach to enhance the global strength of 3D objects under all possible load distribution, which make the strength of the object isotropic to resist different forces. The method is based on modal analysis. We first detect the weak region of the object and then reinforce it by optimizing the eigenvalue of the stiffness matrix. Based on the concept of Rayleigh Quotient, an efficient algorithm is also presented. Experiments show that our method can effectively improve the global strength of 3D objects.

Original languageEnglish
Pages (from-to)590-596
Number of pages7
JournalJisuanji Fuzhu Sheji Yu Tuxingxue Xuebao/Journal of Computer-Aided Design and Computer Graphics
Issue number4
Publication statusPublished - 2015 Apr 1


  • Eigenvalue optimization
  • Modal analysis
  • Rayleigh Quotient
  • Structure optimization

ASJC Scopus subject areas

  • Computer Graphics and Computer-Aided Design
  • Software


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