机械科学与技术2011，Vol.30Issue(12)：2056-2060,5.
变截面输液管道流固耦合振动特性研究
Fluid-structure Interaction Characteristic Analysis of Stepped Pipe Conveying Fluid
摘要
Abstract
In order to analyze the vibration character of the stepped pipe conveying fluid, the vibration characteristic of stepped pipe, based on the 4-equations model of fluid-structure interaction, was studied by wave propagation approach in this paper. The reflection model of vibration wave at all kinds of supports and the reflection/transition model at the stepped cross section were established based on the continuity and force balance condition, respective- ly. The validation of the proposed method was verified through the analysis of critical velocity. As an example, a piece of pipe simply supported at both ends with stepped section at the middle point was investgated. The vibration characteristic equation was developed in terms of wave-train closure principle. Finally, the graphs of natural frequency distribution were obtained for four different cases. The results show that the proposed method is much effective and easy to programming.关键词
输液管道/波传播/流固耦合/固有频率Key words
pipe conveying fluid/wave propagation/fluid structure interaction （FSI）/natural frequency分类
数理科学引用本文复制引用
李宝辉,高行山,刘永寿,岳珠峰..变截面输液管道流固耦合振动特性研究[J].机械科学与技术,2011,30(12):2056-2060,5.基金项目
西北工业大学研究生创业种子基金项目（Z200931）,西北工业大学研究生创业种子基金项目（Z200932）,国家高技术研究发展专项（863计划）项目（2007AA04ZA04）,国家自然科学基金（10472094）和高等学校创新引智计划项目（B07050）资助 （）
