李松晶, 鲍文. 采用MATLAB Simulink的液压管路瞬态压力脉动分析[J]. 工程力学, 2006, 23(9): 184-188.
引用本文: 李松晶, 鲍文. 采用MATLAB Simulink的液压管路瞬态压力脉动分析[J]. 工程力学, 2006, 23(9): 184-188.
LI Song-jing, BAO Wen. ANALYSIS OF TRANSIENT HYDRAULIC PRESSURE PULSATION IN PIPELINES USING MATLAB SIMULINK[J]. Engineering Mechanics, 2006, 23(9): 184-188.
Citation: LI Song-jing, BAO Wen. ANALYSIS OF TRANSIENT HYDRAULIC PRESSURE PULSATION IN PIPELINES USING MATLAB SIMULINK[J]. Engineering Mechanics, 2006, 23(9): 184-188.

采用MATLAB Simulink的液压管路瞬态压力脉动分析

ANALYSIS OF TRANSIENT HYDRAULIC PRESSURE PULSATION IN PIPELINES USING MATLAB SIMULINK

  • 摘要: 给出了包括瞬态摩擦阻力项的液压管路中瞬态压力脉动分析的数学模型,提出了采用MATLABSimulink中SELECTOR模块对偏微分方程进行空间上的积分,从而求解时间和空间域上的二维偏微分方程的新方法,以一段两端分别连接油箱和阀的直管道为例,利用该方法对液压阀突然关闭后管道中压力脉动动态响应特性进行了求解,给出了相应的压力脉动波仿真结果,与已发表的采用特性线法和有限元法求解结果进行了比较,并对数值计算中的非物理振荡问题进行了讨论。

     

    Abstract: The mathematical model of fluid transients inside hydraulic pipelines is introduced including the unsteady friction item.A new method using SELECTOR block in MATLAB Simulink is developed to handle the integration in spatial domain when solving the partial differential equations.Using this method,the pressure transients inside hydraulic pipelines can be predicted both in time and spatial domains.A straight pipeline with a hydraulic valve on one side and a reservoir on the other side is studied as an example.The pressure pulsations inside the pipeline after the valve is shut off are simulated using the new method.The simulation results are given and compared with the predictions from characteristics method and finite element method published previously.The high frequency oscillation problem created by the numerical analysis is also discussed.

     

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