Journal of Shanghai Jiaotong University ›› 2017, Vol. 51 ›› Issue (12): 1415-1421.doi: 10.16183/j.cnki.jsjtu.2017.12.002

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Model Updating Analysis of Structural Dynamic Problem Based on Multi-Level Weight Coefficients

CHEN Luyun,YANG Nian   

  1. State Key Laboratory of Ocean Engineering; The Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai 200030, China
  • Online:2017-11-30 Published:2017-11-30

Abstract: In the present article, a modified finite element model updating method for structural dynamic response was proposed. The model updating based on natural frequency and dynamic response parameter was established, respectively. The optimization formulation for dynamic model updating was deduced by consideration of frequency factor and dynamic response factor. Based on the multi-parameter factors and multi-level factors for the dynamic characteristics of the complex structure, the analytical hierarchy process approach was introduced to define of the weight coefficients. According to the dynamic model updating problem, the multi-hierarchy weight coefficient problem was presented, and the normalized model was established. Finally, a ship mounting structure was taken as an example, and its numerical analysis was carried out. The results demonstrated that the proposed method has provided a new approach to analyze the dynamic model updating problem of complex structure.

Key words: structural dynamic, model updating, analytical hierarchy process, weight coefficients

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