海洋平台输液管道振动流特性研究

Study on Flow Behavior of Flow-Induced Vibration in Pipeline on Offshore Platforms

该文研究了海洋平台输液管道振动流的行为特性。依据振荡流体力学基本原理 ,建立了输液管道非定常、不可压缩、粘性振动流的物理模型和数学模型。推导出了关于流场速度、压力系数的微分方程组 ,得到了不同条件下流动的速度和压力分布。结果表明流体诱发的海洋平台输液管道振动流的行为特性受管道结构形状及流体性质的影响。比较等截面管道的变分解和数值解 ,说明本文所选用的方法用于研究海洋平台输液管道振动流是有效的。

This paper studies the flow behavior of flow-induced vibration in pipeline on offshore platforms. Based on the basic theory of oscillating fluid mechanics,the paper establishes the physical and mathematical models of unsteady, incompressible, viscous vibrating flow in pipeline, derives the expressions for the differential equations of velocity and pressure coefficients in flow, and obtains velocity and pressure distributions under different conditions. The results indicate that the flow behavior of flow-induced vibration is affected by pipe structure and the properties of fluid. Comparison between numerical result and variational solution shows that the method utilized for studying flow behavior of flow-induced vibration in pipeline on offshore platforms utilized is effective.