柱塞泵压力脉动随机动力特性分析及实验研究

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (16) : 188-191.

论文

顾振杰，白长青

作者信息 +

Stochastic dynamic analysis and experimental study on pressure fluctuation of plunger pumps

GU Zhenjie, BAI Changqing

Author information +

文章历史 +

摘要

考虑流体流动、转子转动等随机性引起的压力脉动波动特性，提出了柱塞泵压力脉动的随机动力学表达式，并通过三柱塞泵-管道系统实验获得压力脉动随机参数的概率分布规律为极值I型分布。根据所提出压力脉动随机动力学表达式，应用蒙特-卡罗方法进行管道动力响应分析，通过与实验数据对比验证了所提出表达式的合理性。根据实验及数值分析结果发现泵输出压力脉动与管道位移响应均服从极值I型分布，随机压力脉动频率特性中出现和实验一致的1/3倍频。管道动力响应数值分析结果与实验吻合良好，证明所提出的表达式能够准确模拟柱塞泵管道系统内压力脉动随机动力特性，对管道系统的安全性和可靠性设计具有重要的应用价值。

Abstract

Considering the randomness of fluid-flow, rotor rotation and so on, a stochastic dynamic expression for pressure fluctuation of a plunger pumps was presented.It was found that the random parameter for pressure fluctuation is extreme I distribution with the experiment of three plunger pump-pipe systems.Using the proposed expression and Monte Carlo simulation, the stochastic pipeline displacement response was analyzed.It was shown that the extreme I distribution can be used to model the pressure fluctuation and the displacement response; the 1/3 frequency doubling of random pressure fluctuation is consistent with experiment results; the agreement of experimental and numerical analysis implies that the proposed expression can be used to simulate the randomness of pressure fluctuation, which is important for the safety and reliability design of a pipeline system.

导出引用

顾振杰，白长青. 柱塞泵压力脉动随机动力特性分析及实验研究[J]. 振动与冲击, 2019, 38(16): 188-191

GU Zhenjie, BAI Changqing . Stochastic dynamic analysis and experimental study on pressure fluctuation of plunger pumps[J]. Journal of Vibration and Shock, 2019, 38(16): 188-191

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