By combining the theory of aerodynamics with water hammer equation and wave equation of surge tank a mathematical model for this type of surge tank is established.

为研究制气式调压室的运行机制，运用空气动力学原理，结合管道水锤方程、调压室波动方程，建立了制气式调压室的仿真数学模型。

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The effect of wave velocity adjustment of water hammer on calculation for optimal choosing of the wicket gates closure and opening law types of unit is analysing.

分析研究了水锤波速调整对机组导叶关闭规律优化选择计算的影响。

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Mechanical impact dynamics is used to analyse the production and spread of stress wave when hydraulic pile hammer hammerblows piles, the stress wave influence the course of driving pile.

本文应用冲击机械系统动力学分析打桩过程中锤体与桩撞击时应力波的产生、传播以及该波对沉桩过程的影响。

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"Each wave is like a hammer stroke beating on a sea wall which starts to make it crack and then we have to repair it, " she says.

BBC: Legacy of Britain's great flood