约束模态综合法在折板结构动力分析中的应用

The Application of Constrained Mode Synthesis Method in Dynamic Analysis of Box Girder Structures

折板理论是折板结构静力分析的精确方法。同样,在应用于折板结构的动力分析时具有计算简便、精度高等优点。本文应用约束模态综合法,对折板理论中的位移函数进行修正,从而可以充分反映出组成折板结构各板块内部的振动特性,进而反映折板结构整体的振动特性。

I Folded-plate theory is an analytical method for box girder static analysis. The theory gives good results for box girder natural vibration characteristics analysis. In this paper, the natural vibration characteristics of box girders are analyzed by using a modified displacement function in folded plate theory, an idea evoked by constrained mode synthesis method. It is both simple and reliable,and has a relatively high accuracy.