不同流体加速度描述对输液曲管稳定性的影响

胡育佳, 李海港

振动与冲击 ›› 2015, Vol. 34 ›› Issue (15) : 168-174.

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (15) : 168-174.
论文

不同流体加速度描述对输液曲管稳定性的影响

  • 胡育佳, 李海港
作者信息 +

The effect of different fluid accelerations on the stability of curved pipes conveying fluid

  • HU Yujia  Li Haigang
Author information +
文章历史 +

摘要

在自然坐标系中建立了具有任意初始构型可伸长输液曲管的数学模型并进行了数值模拟。为了便于处理边界条件,引入新的独立变量,采用微分求积法(DQM)和分块矩阵的方法求解输液曲管的固有频率。讨论了三种流体加速度表示方法对可伸输液管道稳定性的影响。研究发现,对复杂构型的输液曲管,三者的第一阶固有频率随着流速的增大,差别越来越显著;然而,对于规则构型的输液管道,结果却非常相近。

Abstract

A dynamic model of an extensible curved pipe with an arbitrary initial configuration was established in an arc coordinate system and its numerical simulation was processed afterwards. A new independent variable was introduced to solve the boundary conditions in order to obtain the natural frequencies of the curved pipes conveying fluid based on the differential quadrature method (DQM) and partitioned matrix method. The effect of three fluid accelerations on the stability of the pipes conveying fluid was discussed. It can be found that, with the increasing fluid velocities, the difference in the first natural frequencies of pipes with complex configuration becomes more significant under the assumption of three different fluid accelerations. However, for the regular pipes, the effect of the fluid acceleration on natural frequency is insignificant.

关键词

输液曲管 / 微分求积法 / 固有频率 / 流体加速度

Key words

curved pipe conveying fluid / DQM / natural frequency / fluid acceleration

引用本文

导出引用
胡育佳, 李海港 . 不同流体加速度描述对输液曲管稳定性的影响[J]. 振动与冲击, 2015, 34(15): 168-174
HU Yujia Li Haigang. The effect of different fluid accelerations on the stability of curved pipes conveying fluid[J]. Journal of Vibration and Shock, 2015, 34(15): 168-174

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