充液管道中弯头流固耦合振动分析数学建模研究
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摘要
基于特征线14方程模型,对充液管路系统中弯头处的流固耦合进行了建模研究,得出了弯头处的平衡方程,通过C++软件开发管道流固耦合时域响应计算程序,结合文献算例验证了建模的正确性,研究了弯头对管道流固耦合振动特性的影响。结果表明,和直管相比,弯接头的存在能够降低流固耦合作用中流体压力和管道所受轴向应力脉动的峰值;弯头角度为90°时,弯头处流体压力脉动以及管道轴向应力脉动的峰值最小。
Based on the characteristic equation of 14 equations, the modeling of elbow coupling in liquid filled pipe system is researched on, and the equilibrium equation at the elbow is given out, through the software based on the MOC method and compared with examples, the correctness of the modeling is verified. The influence of the elbow on fluid structure interaction is studied. The results show that the existence of the curved joints can reduce the pulse peaks of fluid pressure and axial stress in the pipeline, compared with straight pipe. When the angle of the elbow is 90 degree, the peak values are minimal.
Based on the characteristic equation of 14 equations, the modeling of elbow coupling in liquid filled pipe system is researched on, and the equilibrium equation at the elbow is given out, through the software based on the MOC method and compared with examples, the correctness of the modeling is verified. The influence of the elbow on fluid structure interaction is studied. The results show that the existence of the curved joints can reduce the pulse peaks of fluid pressure and axial stress in the pipeline, compared with straight pipe. When the angle of the elbow is 90 degree, the peak values are minimal.
引文
[1] 华颖钰.输流管道动力学问题的数值计算研究[D].南京:南京航空航天大学,2015.
[2] 金长明.充液管道振动特性分析及其减振控制[D].上海:上海交通大学,2010.
[3] 崔安娜.基于数值分析的液压系统管道流固耦合振动研究[D].南昌:华东交通大学,2008.
[4] 张立翔.输流管道流固耦合振动研究进展[J].水动力学研究与进展,2000,15(3):366-379
[5] 姚煜中.充液管道动力学建模与振动特性分析[D].上海:上海交通大学,2011.
[6] Lavooij,Tijsseling.Fluid-structure interaction in liquid filled piping systems[J].Journal of Fluids and Structures.1991(5):573-595
[7] 权凌霄.液压管路流固耦合振动机理及控制研究现状与发展[J].机械工程学报,2015,51(18):175-183.
[8] 杨超,范士娟.管材参数对输液管流固耦合振动的影响[J].振动与冲击,2011,30(7):210-213
[9] YANG Chao,YI Menglin.Numerical Solution Of Fluid-Structure Interaction in Liquid-Filled Pipes By Method Of Characteristics[J].Chinese Journal Of Mechanical Engineering,2007,20(3):44-49.
[10] 刘鸿文.材料力学[M].北京:高等教育出版社,2005.
[2] 金长明.充液管道振动特性分析及其减振控制[D].上海:上海交通大学,2010.
[3] 崔安娜.基于数值分析的液压系统管道流固耦合振动研究[D].南昌:华东交通大学,2008.
[4] 张立翔.输流管道流固耦合振动研究进展[J].水动力学研究与进展,2000,15(3):366-379
[5] 姚煜中.充液管道动力学建模与振动特性分析[D].上海:上海交通大学,2011.
[6] Lavooij,Tijsseling.Fluid-structure interaction in liquid filled piping systems[J].Journal of Fluids and Structures.1991(5):573-595
[7] 权凌霄.液压管路流固耦合振动机理及控制研究现状与发展[J].机械工程学报,2015,51(18):175-183.
[8] 杨超,范士娟.管材参数对输液管流固耦合振动的影响[J].振动与冲击,2011,30(7):210-213
[9] YANG Chao,YI Menglin.Numerical Solution Of Fluid-Structure Interaction in Liquid-Filled Pipes By Method Of Characteristics[J].Chinese Journal Of Mechanical Engineering,2007,20(3):44-49.
[10] 刘鸿文.材料力学[M].北京:高等教育出版社,2005.