ESTIMATION OF STRUCTURAL DYNAMIC PROPERTIES BY A MULTIVARIATE AUTOREGRESSIVE PROCESS WITH AMBIENT VIBRATION DATA

Abstract

To establish the estimation method of dynamic properties (frequency, damping, and mode shape) by ambient vibration measurement, multi channel observation data based vector AR model was proposed. In this paper, the vector AR model was introduced, and the relation between vector AR model with multi channel observation data and single point data was indicated. To verify the method's efficiency, simulation of ambient vibration for Langer girder bridge model, experiment of ambient vibration for 5DOF model, and existing Langer truss bridge were conducted.