ANALYSIS AND PROCESSING METHOD FOR INTEGRATION ERROR OF HIGH SPEED RAILWAY BRIDGE VIBRATION TEST DATA

摘要

Field vibration test of high speed railway bridge was carried out, and the vibration acceleration data of the bridge was gotten.When transforming the measured acceleration data to velocity data by integration, the vibration velocity waveform appears serious distortion, Through analysis the conclusions are as follows.The original test data contains error composition due to the instruments performance and interference of test environment, which would be magnified by integration transforming.The error composition induce distortion of the vibration velocity waveform.In order to get satisfactory results, integration transforming should combine with high-pass filter and eliminating trend term processing.The order of the three processing steps will affect the accuracy of integral results, and it's important to select the correct processing steps order.