In this article, a calculation method is put forward for free vibration frequency of a pipe which contains flow fluid.

本文提出了对包含有流动流体的管道自由振动频率的一个计算方法。

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Research shows that, it is suitable for rotor dynamics, dynamic analysis of helicopter rotor blades fuselage systems and piping systems contained flow fluid.

研究表明，本方法适用于转子动力学，直升机旋翼-机身耦合系统以及具有流体流动的管道系统的动力分析。

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We can obtain the impeller's interior actual flow situation and the impeller internal stress distribution due to axial flow fluid-solid coupling numerical simulation.

通过对轴流泵叶轮流固耦合的数值模拟，得到了叶轮内部真实流动情况和叶内部应力分布情况。

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Inside the riser pipe is a space about half a meter in diameter, large enough to hold the spinning drill pipe and bit and to allow the return flow of drilling fluid.

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This swirling slows down the flow, and thus helps the fluid to cling to the surface.

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At that depth stopping the flow with a deadweight of drilling fluid should create few problems, once the exceedingly difficult challenge of hitting the well is met.

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