斜拉桥参数振动引起的拉索大幅振动

本文对斜拉桥拉索的参数振动问题建立了非线性力学模型，并对其进行了数值计算分析。通过对数值计算结果的分析，指出了拉索参数振动的可能性，并对拉索参数振动的一些特征进行了分析及对抑制拉索参数振动提出了在桥面上施加调频质量阻尼器的途径。

CABLE VIBRATION FOR CABLE STAYED BRIDGE BY PARAMETRIC RESPONSE

In this paper the nonlinear mechanical model for parametric vibration problem of cable-stayed bridges is presented and studied with numerical method. It is pointed out that the parametric response may occur in a cable stayed bridge due to the deck vibration under certain conditions. Based upon the numerical calculation, a TMD system under the bridge deck is proposed to serve as a possible damping system. It is shown that the cable's parametric vibration of the cable stayed bridge with TMD damping system is reduced significantly.