基于速度响应的振动台基础动力参数分析方法

t present, the test method of dynamic foundation parameters is based on low damping ratio. Frequency, damping ratio, stiffness and equivalent mass of foundation are determined adopting its resonance peak of displacement response under constant or variabl excitation. But when the damping ratio is more than 0.6, the resonance peak is not obvious, even vanished, and then, the former method is not applicable. This paper achieves a new method to acquire the dynamic parameters of foundation based on velocity response under constant excitation. This method is applicable for any damping ratio, and more simple and applicable.