边跨曲线布置的高低塔斜拉桥固有振动耦合分析

Coupling Analysis of Natural Vibration of High-low Tower Cable Bridge with Curved Side Span

通过对边跨为曲线布置的某高低塔斜拉桥进行三维有限元动力学分析表明,该类桥梁的固有振动耦合原因,并非一般斜拉桥的拉索作用,而主要是由于其边跨的曲线布置。进而采用调整模型相关构件的刚度的方法,确定了耦合的区域,为该类桥梁进行下一步的气弹模型抗风试验研究提供了参考。

Based on the three-dimensional finite element dynamics analysis of a high-low tower cable bridge with curved side span,it shows that the main reason of coupling of natural vibration is the curved side span,rather than the cable that cause the classic coupling of cable bridge. By adjusting the rigidity of related component,it determines the region of coupling,and provides reference for wind tunnel test of aeroelastic model of this kind of bridge.