车桥耦合动力学系统模态综合分析

由于桥梁上的车辆荷载是一个带有质量的振动系统,从而使得桥梁在该荷载作用下的动力响应问题比一般结构动力系统的响应问题更复杂。车辆和桥梁可看成一个整体耦合动力学系统的两个分支,并引入模态综合法来分析其动力响应。结果表明利用模态综合法可以将车辆与桥梁之间的边界作为系统的内部耦合条件,从而使边界条件比较明确。

Mode Synthesis Analysis of the Dynamic SystemCoupling Bridge with Vehicle

The analysis of dynamic responses of a bridge subjected to a moving vehicle load is more difficult than that of other dynamic systems, because the vehicle load moving on a bridge is also a vibration system with mass. The bridge and the vehicle are treated as two branches of a coupling dynamic system respectively, and the mode synthesis method is applied to analyzing the responses of the coupling system. The results of the research indicate that the interfaces between the bridge and the vehicle acting as interior coupling information are very explicit by using the method.