In order to analyze the problem of pipeline vibration induced by unsteady flow of internal fluid in T -shaped pressure pipeline , the fluid-structure interaction analysis method was adopted .The numerical simulation on the fluid-structure interac-tion of T-shaped pressure pipeline transporting gas medium was conducted by using the finite element analysis software ADI -NA.The change of internal fluid flow parameters and the stress distribution of the pipeline were obtained , and the vibration characteristics of the pipeline were predicted .Meanwhile , the experimental tests on the vibration characteristics of T-shaped pressure pipe were conducted by using the measuring and testing system of pipeline vibration , and the coupling vibration re-sponse frequency of the pressure pipeline was obtained .The results showed that the numerical calculation results of fluid-structure interaction were consistent with the experimental results .The effect of fluid-structure interaction was obvious in T-shaped pressure pipeline with fluid medium , while the results without considering the fluid-structure interaction had a great difference compared with the experimental results .%为研究T型压力管道结构内部流体非定常流动诱发的管道振动问题,采用流固耦合分析方法进行分析,借助有限元分析软件ADINA对输送气体介质的T型压力管道结构的进行了流固耦合数值模拟,得到了管内流体流动参数的变化以及管道应力分布规律,并预测了管道振动特性.同时,利用管道振动测试试验系统进行T型管道结构的振动特性进测试,得到压力管道耦合振动响应频率.结果表明:流固耦合数值计算的结果与试验结果能较好地吻合,流体介质的T型压力管道内存在明显的流固耦合效应,不考虑流固耦合作用结果与实验结果相差很大.
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