分段低压输水管系水力振荡的动荷载分析

Study on dynamic load of hydraulic oscillation in stepped low pressurized piping system

本文将结构动力学思想引入到水流振荡问题中分析来,深入探究了非恒定流调节时,分段低压输水系统水面及流量振荡的机理。并应用仿真计算,证明来水过程即为输水系统相应的动荷载。在此基础上结合信号分析理论研究了来水过程对输水系统水力振荡的影响,采用三角函数方式控制来流,可以实现通过对动荷载的控制来减小输水系统的水力振荡。

The theory of structural dynamics is introduced to deal with the hydraulic oscillation low pressurized piping system. The oscillation mechanism of water surface and discharge in during unsteady regulation is analyzed. The numerical simulation of the dynamic process of of stepped the system the system reveals that the income water flow is corresponding to the dynamic load of the structural system. On this basis,the effect of income water variation process on the hydraulic oscillation of system is studied by applying the signal analysis theory. It is found that if the income water flow is controlled following a trigonometric function mode the oscillation of the system can be reduced.