【作者】 侯宇； 曾国华； 李公法；

【Author】 HOU Yu;ZENG Guo-hua;LI Gong-fa;College of Machinery and Automation,Wuhan Univ.of Sci.and Tech.;

【机构】 武汉科技大学机械自动化学院；

【摘要】 输流管道的横向振动是造成管道破坏的主要原因.首先建立了输流管道系统的横向振动有限元方程,给出了四种不同的边界约束条件.应用振型分解法进行了系统的模态分析,分别求解了振动系统在无阻尼和有阻尼情况下的固有频率和固有振型.采用Newmark法求解了系统的响应.研究了管道跨距、流体流速、流体压强、流体流速扰动、流体压强扰动等系统参数对振动系统的模态和响应的影响,为输流管道系统的减振研究提供了理论支持.更多还原

【Abstract】 Transverse vibration of fluid-conveying pipes is the main reason for the damage of pipeline.Firstly,the finite element equations of transverse vibration of fluid-conveying pipes were established,and four kinds of Boundary constraints were proposed.The modal analysis of vibration system was carried out by using modal decomposition method.The Natural frequencies and the natural mode of vibration were solved in non-damped and damped cases.The system responses were solved by using Newmark method.The influence from some system parameters,such as pipe span,fluid velocity,fluid pressure,fluid velocity disturbance,and the fluid pressure disturbance on the modal and response of vibration system were studied.The research results provide theoretical support for the vibration reduction research of fluid-conveying pipes.更多还原