中文摘要：

基于流固耦合理论,采用实验和数值模拟相结合的方法对过桥水管的动力特性进行研究.结果表明：双向流固耦合数值模拟得到的过桥水管的固有频率与实验结果较为相近,在流速变化范围不大的情况下,水体的流速对管道的固有频率影响很小,而且随着流速的增大,管道的固有频率减小;由于管道为弯管,随着速度的增加,水体对管道的压力和拉直作用相应增加,管道的变形和应力也随之增大.

英文摘要：

Based on the theory of fluid -structure interaction （FSI）, the dynamic characteristic of water pipe across bridge is studied by combining the method of model experiment and numerical simulation. The results show that the natural frequency of the experiment method of fluid conveying pipe is relatively close to two - way FSI numer/cal simulation, not big, the velocity of fluid has very small influence and in the case that velocity variation rang is on the natural frequency of the fluid conveying pipe. What＇ s more, with the increase of flow velocity, the natural frequency of the pipeline reduce. Due to curved pipe, with the increase of speed, the pressure and straightening effect on the pipe is increasing gradually, and the deformation and stress of the pipe is increasing accordingly.