断波作用下块体失稳探讨

Discussion of block losing stability acted by surge

对现有的块体在水流作用下失稳的表达式进行评述,介绍了断波的形成条件,根据断波作用下块体的受力条件,推导了断波作用下块体失稳的公式,此公式与现有公式相比,多出了与波高有关的一项,表明有断波作用下的块体与无断波作用的块体相比更易失稳。如果断波波高较大,使得作用在块体上的水压力差占主导作用时,块体的失稳粒径与断波波高成正比。

The existence formulas of block losing stability under the action of flow are reviewed;the surge s form condition and movement process are introduced in this paper.Based on the analysis of the forces on the block,the formula of block losing stability under surges affection is derived.The formula shows that the block easier losing stability acted by surge that acted by uniform flow.When the surges height is large,so that the pressure difference becomes the main force,the diameter losing stability of block ...