摘要
根据对单元体受力分析推导出了弹性地基输流管道的振动微分方程,应用分离变量法和数值方法计算了弹性地基输流管道在两端铰支情况下的模态和固有频率。研究了固有频率与管道内输送流体流速之间的关系;重点讨论了弹性地基、质量比、轴向力对固有频率与流速之间关系的影响,结果表明这些系数对于输流管道的振动特性有显著的作用。
AbsBased on the stress anylysis of element, the vibration differential equation of the pipe conveying fluid on elastic foundations is derived, the mode and the nature frequency of the pipe are calculaed by variable-separating method and numerical method. The relation between nature frequency and the velocity of fluid conveyed in the pipe is investingated; at the same time, some parameters（inflexibility,elastic foundation,longitudinal tension）which cause the effects to the relation are emphasised, the results shows that these parameters have obvious effects to the characters vibrations of pipe conveying fluid.
出处
《沈阳航空工业学院学报》
2008年第1期42-46,共5页
Journal of Shenyang Institute of Aeronautical Engineering
关键词
弹性地基
输流管道
模态
固有频率
分离变量法
elastic foundation
pipe conveying fluid
mode
nature frequency
variable-separating method
