Sensor location selection and response reconstruction of a substructure

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (6) : 257-262.

ZHANG Xiaohua, ZHOU Haiyang, WU Zhibiao

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Abstract

A method for sensor location selection was proposed for the response reconstruction of a substructure.According to the structure of a system, the whole structure was disassembled into several substructures to reduce the number of degrees of freedom (DOFs).Then the sensor location optimization and response reconstruction of each substructure were conducted separately.Since the number of DOFs of each substructure is far less than that of the whole structure, the method can improve the efficiency of sensor location optimization and response reconstruction.The sensor locations were determined by minimizing the reconstruction errors between the reconstructed and analyzed responses.The results of numerical and experimental investigations demonstrate that the reconstructed response by using finite measurements match well with the analyzed or measured responses both in time and frequency domains.The proposed method does not reuqire to isolate the substructures and consider the complicated boundary conditions, which is beneficial for its application in large-scale civil engineering structures.

Key words

substructure / sensor optimal placement / finite measurements / response reconstruction

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ZHANG Xiaohua, ZHOU Haiyang, WU Zhibiao . Sensor location selection and response reconstruction of a substructure[J]. Journal of Vibration and Shock, 2020, 39(6): 257-262

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