为避免二维波方程中的大量计算，使用二维波动方程的中心差分近似来模拟流体运动。
This paper used centered difference to simulate the fluid movement in order to avoid lots of calculations in two dimension wave equation.
液压振动系统的主要特点是在桩机液压系统中的压桩油路产生流体压力变化和波动，从而使沉桩力出现高频的周期变化，产生振动压桩的效果。
The main character of the HVS is that, by means of fluctuating oil pressure, the pile-driving force can be changed in a higher frequency, and therefore better vibrating effect can be gained.
在本文中应用渐近级数来求解在非均匀流动中的两层迭加流体的波动问题。
In this paper, the asymptotic series are applied to solve problems of non-uniform flow on a two-layer fluid.
压力波动是流化床设计和操作中的重要参数，其信号包含了床内大量的流体动力学行为特征。
Pressure fluctuating is an important parameter in the design and operation of fluidized bed, the signals of which contains a lot of behavioral traits of fluid dynamics inside the bed.
本文用混合隐式特征线法求解了井内流道中的瞬态波动压力问题，给出了弹性管和可压缩流体在井内各流道组合的压力波波动方程和定解条件。
By using the combined implicit characteristic line method, the calculation of the transient surge pressure in the flow conduit of a drilling well has been resolved in this paper.
所引起的波动而产生能量通过流体的结构部件和到空气中的噪音。
The ripples create energy fluctuations which pass through the fluid to the structural components and into the air as noise.
所引起的波动而产生能量通过流体的结构部件和到空气中的噪音。
The ripples create energy fluctuations which pass through the fluid to the structural components and into the air as noise.
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