阻尼效应的振动台模型试验研究

Study on damping effect about shaking table test

摘要:

本文设计并进行了十层框架的模型振动台试验，分别进行了低频、中频、高频地震波模型试验。根据模型试验结果，应用不同模型试验数据分析方法（包括自由振动衰减、半功率法和HHT变换法），得出了模型结构前三阶自振频率及对应的振型阻尼比，再分别采用瑞雷阻尼假定和柯西阻尼假定，进行了相应模型结构地震反应的数值模拟，比较了不同阻尼模型之间的差异，较为详细的描述了如何根据试验结果从而作出较为合理的数值模拟。

Abstract:

This paper designed and condeuced a ten-story frame model about shaking table test, carried out the model test under low frequency,medium frequency and high frequency respectly.According model test results,using different analysis methods, including free vibration attenuation, half-power spectrum method and HHT method. Acquire the first three natural frequency and correspond model damping ratio.Then conduced the corresponding numerical simulation of the model test use Rayleigh and Caughey damp assumption.And compared the differences between different damping models.Described how to make more reasonable simulation according experiment result detailed.