An effective independenceimproved modal strain energy method for optimal sensor placement

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (1) : 82-87.

ZHAN Jie-zi1，YU Ling1,2

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Abstract

Here, a novel effective independenceimproved modal strain energy (EI-IMSE) method was proposed to improve the effective independence (EI) algorithm in structural health monitoring field. The EI-IMSE optimal sensor placement (OSP) method was verified using a numerical simulation for a 3D truss tower and a test for a rectangular hollow steel beam hinged at both ends. Based on four criteria, the EI-IMSE OSP method was evaluated compared with the EI method, the EI-driving point residue (EI-DPR) one, the EI-average driving DOF velocity (EI-ADDOFV) one, and the EI-average acceleration amplitude (EI-AAA) one. The results showed that the proposed EI-IMSE method can not only retain advantages of the EI method but also have a better accuracy in identifying low order modes with a good robustness.

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structural health monitoring / modal test / optimal sensor placement / effective independence

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ZHAN Jie-zi1，YU Ling1,2. An effective independenceimproved modal strain energy method for optimal sensor placement[J]. Journal of Vibration and Shock, 2017, 36(1): 82-87

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