搜索

x

弹簧边界条件下双参数地基上水平输流管道稳定性分析

Stability of fluid conveying pipe on the two-parameter foundations with elastic support boundary conditions

  • 摘要: 研究了双参数地基下输流管道在弹簧支承边界条件下的振动稳定性。基于欧拉-伯努利梁理论,采用哈密顿原理建立输流管道动力学方程,考虑两端弹簧支承边界条件,通过改变弹簧刚度大小,可以简化成多种边界条件。利用调和微分求积(HDQ)方法对振动方程进行离散化求解计算,分析了水平输流管道不同弹簧刚度、双参数地基参数、流体质量比对管道临界速度、临界频率和模态振型的规律。研究结果表明:弹性地基可以有效地提高管道振动的稳定性。此外,弹簧支承和地基对管道的振动模态有显著影响。

     

    Abstract: In the report, the vibration stability of fluid conveying pipe under two-parameter foundations with elastic support boundary conditions was investigated. Based on the Euler-Bernoulli beam theory, the Hamiltonian principle was used to establish the dynamic equations of the pipe. The change of spring stiffness simplified the elastic support boundary conditions at both ends into various boundary conditions. The harmonic differential quadrature (HDQ) method was used to discrete and solve the vibration equations. The effects of the different spring stiffnesses, two parameter foundation parameters, and the fluid mass ratios on the critical velocity, critical frequency, and modal shape of the pipe were analyzed. The results indicated that the elastic foundation could effectively improve the stability of pipeline vibration. Additionally, the spring support and foundation had a significant effect on the vibration modes of the pipe.

     

/

返回文章
返回