采用纵向翼形管模拟水击波速

Theapproach to simulate the water hammer wave speed by using longitudinal fin of pipe in hydraulic modelling

在水击模型实验中，采用纵向翼形管是模拟水击波速的有效途径之一．为了便于确定翼缘长度，满足模型设计，本文应用结构力学方法和平面有限元方法研究了翼缘长度、管壁厚度、管道半径、管材的弹模等关键参数对水击波速的影响，揭示了该结构型式的管道在内水压力作用下变形量与水击波速间的内在规律，并将理论计算与实验结果进行了对比，两者十分吻合．

In this article the structural mechanics and 2 - D finite element method are to be applied to investigate the effect of fin length, wall thickness, pipe radius,Young's modulus of elasticity on water hammer wave speed. The relationship between the deformation and wave speed for this kind of pipe under internal pressure is revealed. The computational result is well agreed with that derived from model test.