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由于管道内压力瞬间升高,压力波在管道内以声速传递,导致水力系统流量和压力动态变化,即产生水力瞬变(水锤),通过刚性水锤模型和弹性水锤模型分析给水管线水力瞬变,采用简化的有限差分方程,建立特征线法水力瞬变数学模型,并建立了泵、阀动作的边界条件,可借助于特征线方程和边界条件方程,求解管线内水锤波的暂态,以解决复杂的管路系统和边界条件的水锤问题。
Due to the instantaneous increase of pressure in the pipeline, the pressure wave is transmitted at the speed of sound in the pipeline, resulting in the dynamic changes of the flow and pressure in the hydraulic system, ie, the hydraulic transient (water hammer) is generated. The water supply pipeline hydraulic pressure is analyzed by the rigid water hammer model and the elastic water hammer model Transient, the simplified finite difference equation is used to establish the transient model of hydraulic transient by the characteristic line method, and the boundary condition of pump and valve action is established. By means of the characteristic equation and the boundary condition equation, State to solve the problem of water hammer in complex piping systems and boundary conditions.