普渡河倒虹吸管桥组合结构模态分析

Model Analysis of Pipe-bridge Combined Structure of Inverted Siphon on Pudu River

以昆明市掌鸠河引水供水工程普渡河倒虹吸为工程背景,建立了水力学与结构动力学相结合的水弹性模型,在此基础上,采取模型试验和计算机数值模拟计算两种方法,对普渡河倒虹吸管桥组合结构进行模态分析,并使其互相印证.两种方法所得结果吻合得很好,说明这种模拟方法是成功的,是研究组合结构振动新的有效途径.

In this paper,the hydro-elastic model or inverted siphon of Kunming Pudu River Diversion&Water Supply Project was built up,which satisfied the requirements of similarity criterions of both hydraulics and structure dynamics.On the basis of hydro-elastic model,the model test and the computer numerical simulation method are applied to model analysis of pipe-bridge combined structure of inverted siphon of Pudu River and the one outcome is used to confirm the other.As a result,we achieved alike outcomes in two ways.It is proved that the simulation is a success,and at the same time a new effective method is found to analyze the vibration of combined structure.