弯曲输流管道流固耦合动力特性分析-噪声与振动控制.PDF

第35 卷 第4 期 噪 声 与 振 动 控 制 Vol 35 No.4 2015 年8 月 NOISE AND VIBRATION CONTROL Aug. 2015 文章编号：1006-1355(2015)04-0043-05 弯曲输流管道流固耦合动力特性分析 俞树荣，马 璐，余 龙 (兰州理工大学 石油化工学院，兰州 730050 ) 摘 要：管道中流体和弹性体之间的相互作用是引起管道振动的主要原因，这种流固耦合作用对管道动力特性有 直接影响。以流固耦合理论为基础，对脉动压力作用下的弯曲输流管道建立流体动力学模型及固体运动模型，在 ANSYS Workbench 中分别进行双向流固耦合受力分析、单双向流固耦合对比分析和模态分析，并考虑脉动压力，壁厚 和管径等参数的影响。结果表明，弯管最大应力发生在入口和出口附近上下部，最大变形发生在转角及中间处；双向 耦合作用下弯管最大等效应力与最大变形量均大于单向耦合；双向耦合作用下弯管固有频率明显降低，且固有频率随 壁厚和管径的增大呈非线性增长。 关键词：振动与波；弯管；流固耦合；动力特性；模态分析 中图分类号：O353.1 文献标识码：A DOI 编码：10.3969/j.issn. 1006-1335.2015.04.010 Analysis of Dynamic Characteristics of Fluid-structure Interaction in Curved Infusion Pipelines YU Shu-rong , MA Lu , YU Long ( College of Petrochemical Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China ) Abstract : Interaction between fluid and elastic solid in fluid-filled pipelines is the main cause of pipeline vibration, which has a direct impact on the pipeline ’s dynamic characteristics. In this paper, based on the theory of fluid- structure coupling, the fluid dynamics model and solid kinematic model were established for a curved liquid-filled pipe impacted by the fluctuating pressure. Force analysis of the double-path fluid-structure interaction and modal analysis were conducted by means of ANSYS Workbench software. The impacts of fluctuating pressure, wall thickness and diameter of the pipeline were taken into account. The results show that the maximum stress occurs at the upper and lower portions in the vicinity of inlet and outlet. The maximum deformation occurs at the cor