Structural damage identification using additional virtual supports

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (10) : 118-123.

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Structural damage identification using additional virtual supports

HOU Jilin1, OU Jinping2, Łukasz JANKOWSKI3

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Abstract

Usually only some lower modes are identified in civil engineering, so it is hard to estimate the damage of large structure accurately. Aim to this problem, the method of adding virtual supports on the structure is proposed for structure damage identification. The virtual supports can be constructed by substructure isolation method using the linear combination of the responses. The structure with additional support is call virtual structure. The styles of the virtual structure are increased largely by adding virtual support on different places of the structure, and then the natural frequencies of all the virtual structures are collected and used for damage identification. A 3-D frame model is built for the verification of the proposed method additional virtual supports.

Key words

Structure Health Monitoring / Damage Identification / Substructure Isolation Method(SIM) / Sensitivity Analysis / Natural Frequency

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HOU Jilin;OU Jinping;&#;ukasz JANKOWSKI. Structural damage identification using additional virtual supports[J]. Journal of Vibration and Shock, 2013, 32(10): 118-123