Technology and Application for Modal testing of Cable-stayed Bridge

摘要

In the cable-stayed bridge damage identification index based on the dynamic characteristics, it is the key and premises for cable-stayed bridge damage identification using dynamic index, how to extract the modal of structure exactly through optimal placement of sensors.This article uses simulated annealing, In line with the modal assurance criterion, extract mechanical analysis data of Zhangzhen cable-stayed bridge ANSYS finite element model and obtain optimized acceleration sensor layout scheme of main beam.Based on this optimization scheme we carry out a dynamic characteristics test on Zhangzhen cable-stayed bridge.Through the comparison between observation results and calculation results, we find they are very closely.To verify that the simulated annealing algorithm based on modal assurance criterion used in cable-stayed bridge acceleration sensors optimized is effective, viable, and correct.