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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 behavioral characteristics of fluid flow in the pipeline of offshore platform. According to the fundamental principle of oscillating fluid mechanics, the physical model and mathematical model of fluid flow in unsteady, incompressible and viscous fluid are established. The differential equations of flow velocity and pressure coefficient are deduced, and the velocity and pressure distribution of flow under different conditions are obtained. The results show that fluid behavior induced by fluid-induced fluid flow in offshore platforms is affected by the shape of the pipelines and the fluid properties. Comparing the variational solution and numerical solution of equal-section pipes, it shows that the method selected in this paper is effective for studying the vibration flow of the pipeline in the offshore platform.