组合管道结构流固耦合振动特性分析  

Analysis of fluid-structure coupling vibration characteristics of combined pipeline structure

作　　者：姚胜婕 王骥骁 柴怡君 杨雄伟[1] 王春明 YAO Shengjie;WANG Jixiao;CHAI Yijun;YANG Xiongwei;WANG Chunming(State Key Laboratory for Strength and Vibration of Mechanical Structures,Shaanxi Key Laboratory of Environment and Control for Flight Vehicle,School of Aerospace Engineering,Xi'an Jiaotong University,710049 Xi'an,China;China Nuclear Power Engineering Co.,Ltd.,100840 Beijing,China)

机构地区：[1]西安交通大学航天航空学院机械结构强度与振动国家重点实验室,陕西省先进飞行器服役环境与控制重点实验室,西安710049 [2]中国核电工程有限公司,北京100840

出　　处：《应用力学学报》2025年第2期405-414,共10页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金民航联合研究基金重点项目(No.U2033208);2020年度中核集团领创科研项目。

摘　　要：为研究输流管道结构在流固耦合作用下的振动特性,采用试验测试和仿真分析获得了组合管道结构充液及未充液状态下的固有频率和模态振型;基于双向流固耦合分析方法求解了管道流致振动响应及流体压力变化,并开展动响应试验测试与数值结果进行对比验证。结果表明,管道固有频率在流体附加质量的影响下明显降低,而模态振型基本不受影响;组合管道结构中直弯管连接处以及弯头等不连续部位的存在,会使管内流体状态受到扰动而出现压力波动,并诱发管道振动,且管道的振动频率与其固有频率接近。研究结果对保证管道系统安全运行具有重要的指导意义。In order to study the vibration characteristics of the pipeline structure under fluid-structure coupling,the natural frequencies and modal shapes of the combined pipeline structure with and without liquid were obtained by test and simulation analysis.Based on the bidirectional fluid-structure coupling analysis method,the flow induced vibration response and fluid pressure change of the pipeline are solved,and the dynamic response test is carried out to compare with the numerical results.The results show that the natural frequency of the pipeline is obviously reduced under the influence of the additional mass of the fluid,but the modal shape is basically not affected.The presence of discontinuous parts such as straight bend joint and elbow in combined pipeline structure will cause the fluid state in the pipe to be disturbed and the pressure will fluctuate and induce pipeline vibration,and the vibration frequency of the pipeline is close to its natural frequency.The research results have important guiding significance to ensure the safe operation of pipeline system.

关 键 词：组合管道结构 流固耦合 干模态 湿模态 振动响应 

分 类 号：O327[理学—一般力学与力学基础]