A STUDY ON THE VIBRATIONS OF PIPELINE CAUSED BY INTERNAL PULSATING FLOWS

管道内脉动流引起的振动研究

• 批准号: 62460106
• 负责人: HAYAMA Shinji
• 金额: $ 4.8万
• 依托单位: UNIVERSITY OF TOKYO
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-62460106/
• 关键词: PRESSURE PULSATION; PIPE VIBRATION; FLUID EXCITING FORCE; RESONANT RESPONSE; TRANSFER MATRIX; FLUID-STRUCTURE INTERACTION; INSTABILITY; 伝達関数; 安全

It is well known that resonant pressure pulsations occur in pipelines due to the periodic discharges(or suctions) from reciprocating compressors and thereby harmful vibrations are generated in the piping systems. For the avoidance of such vibrations, methods are developed by many authors to calculate the pressure pulsations in the pipelines. Few studies, however, have been published on the mechanical vibrations of pipelines caused by internal pulsating flows.In this research project, the exciting forces caused by the internal pulsating flows are analyzed for a curved pipe, and the pipe vibrations caused by them are studied. As a result, the following are found. The exciting forces are generated in the regions where the pipelines have geometrical curves like bends. The lateral vibrations of pipelines are caused by the pressure and momentum fluctuations in the curved regions, and the axial vibrations are generated by the fluctuations of pressure losses, for example, wall frictions or orifices. The transfer matrices to calculate the pipe vibrations are obtained, where the above mentioned exciting forces are introduced as the input forces, and the responses of the pipe vibrations are calculated.The results are in good agreement with the experimental values.

众所周知，由于往复式压缩机的周期性排放（或抽吸），在管道中发生共振压力脉动，从而在管道系统中产生有害的振动。为了避免这种振动，许多作者开发了计算管道中的压力脉动的方法。然而，关于管道内脉动流引起的管道机械振动的研究却很少，本研究以弯曲管道为研究对象，分析了管道内脉动流引起的激振力，研究了管道内脉动流引起的管道振动。结果表明：激振力主要产生在管道具有弯曲等几何曲线的区域;管道的横向振动是由弯曲区域的压力和动量波动引起的，而轴向振动是由压力损失的波动，例如壁面摩擦或孔口引起的。将上述激振力作为输入力，得到了计算管道振动的传递矩阵，并计算了管道振动响应，结果与实验值吻合较好。

项目成果

SHINJI HAYAMA: "A STUDY ON THE VIBRATIONS OF A PIPELINE CAUSED BY INTERNAL PULSATING FLOWS" TRANS. OF JSME, 1990.

Shinji Hayama：“内部脉动流引起的管道振动的研究”Trans。

葉山眞治: ASMF-Pressure Vessel and Piping Conference Flow-Induced Vibrations-1987. 122. 111-116 (1987)

Shinji Hayama：ASMF-压力容器和管道会议流致振动-1987。122. 111-116 (1987)。

葉山眞治: 日本機械学会論文集. (1988)

Shinji Hayama：日本机械工程师学会会议记录（1988）。

葉山眞治: "管内振動流による配管系の振動応答に管する研究" 日本機械学会論文集(予定). (1990)

Shinji Hayama：“管道中振荡流引起的管道系统振动响应的研究”日本机械工程师学会会议记录（计划）（1990 年）。

葉山真治: "管内振動流による配管系の振動応答に管する研究" 日本機械学会論文集. (1990)

Shinji Hayama：“管道中振荡流引起的管道系统振动响应的研究”日本机械工程师学会会刊（1990）。