Mechanics in Engineering ›› 2017, Vol. 39 ›› Issue (6): 585-590.DOI: 10.6052/1000-0879-17-108

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THE DAMAGE LOCALIZATION FOR PLATE STRUCTURES BASED ON MODIFIED MODAL STRAIN ENERGY INDEX

LIANG Zhenbin, DONG Cong, ZHANG Huaxin   

  1. Department of Civil Engineering, Tsinghua University, Beijing 100084, China
  • Received:2017-03-29 Revised:2017-06-25 Online:2017-12-15 Published:2017-09-25

Abstract:

In order to deal with the "vicinity efiect" in the damage localization of plate structures, this paper proposes a method based on the modifled modal strain energy. Firstly, the relative strain change at adjacent points are used to calculate the weight coe-cients, Then the strain energy in the corresponding area is redistributed according to the weight coe-cients. By deflning a damage difierentiation degrees index, the influences of the noise on the damage localization can be evaluated. To verify the feasibility and the efiectiveness of the proposed method, a four edge simply supported plate is used as a numerical example. It is shown that the proposed method can realize an accurate damage localization in dot, block and strip damage cases, with a good anti-noise capability.

Key words:

damage localization|plate structures|modal strain energy|anti-noise capability

CLC Number: