【摘要】 为研究不同建模方法对斜拉桥动力特性的影响,首先以简支梁为研究对象进行分析。文中分别采用单主梁、双主梁对简支梁和斜拉桥进行建模并进行动力特性计算,对两种建模方法计算的结果进行对比,分析两种建模方法对计算桥梁动力特性产生差异的原因。计算结果表明,两种建模方法对竖向弯曲频率、扭转频率影响较小,对横向弯曲频率影响较大。更多还原

【Abstract】 To study the effect of different methods of modeling to the dynamic characteristics of cable-stayed bridges,a simply supported beam is studied and analysised. Single-girder and double-girder are used for modeling and calculating the dynamic characteristics for both bridges in this paper. The comparison of the results from the two methods is made and the causes of the difference of the dynamic characteristics of the bridge resulted by the methods above are analysized. The result shows that adopting the two different methods have a slight effect on the vertical bending frequency and torsional frequency while a relatively heavy influence on the lateral bending frequency.更多还原