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本文在国内首次应用国际著名的 ADINA 程序进行悬索桥结构自振特性非线性分析,获得成功。文中以国内知名的福建省南平市九峰山悬索桥为例,求得其顺桥向纵平面上的固有频率及其相应的振型。计算结果表明,按过去习用的线性模型所得的固有频率值普遍偏低,存在着较大的误差。本文的计算结果也表明 ADINA 程序完全可以用于悬索桥结构动响应的计算。
This paper applies the internationally renowned ADINA program for the first time to carry out the nonlinear analysis of natural vibration characteristics of suspension bridges and achieves success. Taking the Jiufengshan Suspension Bridge, Nanping City, Fujian Province, as an example, the natural frequency and its corresponding mode shapes along its longitudinal direction are obtained. The calculation results show that the natural frequency obtained by the conventional linear model is generally low, and there is a big error. The calculation results of this paper also show that ADINA program can be used to calculate the dynamic response of suspension bridge structure.