摘要
为了研究流体流经弯管时管道力学性能的变化情况,以流固耦合振动理论为基础,建立输流弯管有限元模型,利用ANSYS Workbench得到流体作用下管道的应力和变形,并分析了不同流体脉动频率对管道振幅的影响。结果表明:当流体流经弯管时,最大等效应力出现在管道入口上端和出口左端,最大变形出现在管道弯曲段;考虑单向流固耦合作用时管道应力与形变分析结果小于考虑双向流固耦合作用时的分析结果;输流弯管的主要振动形式为横向振动;流速一定时,流体的脉动频率与弯管的固有频率越接近,弯管的振幅越大。
In order to study the change of the pipe mechanical properties when the fluid flows through the curved pipe,it establishes the finite element model of fluid conveying curved pipe based on the fluid- structure interaction vibration theory. It uses ANSYS Workbench to calculate stress and deformation under the fluid force of pipe,analyzes the influence of the pipe in different fluid pulsation frequency amplitude. The results show that the maximum equivalent stress appears at the top inlet and at the left outlet of pipe when the fluid flows through the curved pipe,and the maximum deformation appears in the pipe bending section. The results are smaller than the results when the two way FSI is considered. The main vibration mode of the pipe is lateral vibration. When the velocity is constant,the fluid pulsation frequency is closer to the natural frequency of the pipe,and the amplitude of the pipeline is larger.
作者
窦益华
于凯强
杨向同
曹银萍
DOU Yihua YU Kaiqiang YANG Xiangtong CAO Yinping(College of Mechanical Engineering, Xilm Shiyou University, Shaanxi Xihn, 710065, China Tarim Oilfield Company of China Petroleum Co. , Ltd. , Xinjiang Korla, 841000, China)
出处
《机械设计与制造工程》
2017年第2期18-21,共4页
Machine Design and Manufacturing Engineering
基金
国家自然科学基金资助项目"体积压裂管柱特殊螺纹接头流固耦合振动机理及密封性研究"(51404198)
关键词
输流弯管
流固耦合
振动
有限元分析
fluid conveying curved pipe
fluid-structure interaction
vibration
finite element analysis
