【作者】 程利； 陈明；

【Author】 CHENG Li;CHEN Ming;Wuhan Second Ship Design and Research Institute;

【机构】 武汉第二船舶设计研究所；

【摘要】 周期性加压造成的流体压力脉动是引发管道振动的主要原因。在无阻尼、小波动的情况下建立了管道内流体压力脉动的波动方程;采用分离变量法结合边界条件及初值条件求解管道内压力脉动表达式;针对工程中常用的带弯头管道和异径管路情况,分析了脉动流体在弯管和变截面处对管道的激振力;并将理论解和Fluent数值仿真计算结果进行了对比,结果表明脉动流体对管道的激振力是引起管道振动的重要原因。更多还原

【Abstract】 The pulsation of fluid pressure caused by periodic pressurization is the main cause of pipeline vibration. Which occurs without obstruction, the wave equation of fluid pressure fluctuation in the pipeline is established under the condition of small fluctuation; Using the method of separating variables, solve the expression of pressure pulsation inside the pipeline by combining boundary conditions and initial value conditions; For commonly used pipes with elbows in engineering, analyzed the excitation force of pulsating fluid on the pipeline at bends and variable cross-sections in the case of pipelines with different diameters; and The comparison between the theoretical solution and Fluent numerical simulation results shows that the pulsating fluid exerts an excitation force on the pipeline, It is an important cause of pipeline vibration.更多还原