海洋平台输液管道激振流体特性研究

研究了海洋平台输液管道激振流体的行为特性。依据振荡流体力学及傅里叶变换基本原理，建立了输液管道非定常、不可压缩、黏性振动流的数学模型，将流动分解为稳定流和振荡流2部分，推导出关于流场速度、压力系数的微分方程组，求解了不同条件下的流速和压力。结果表明：海洋平台输液管道激振流体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，说明此方法用于研究海洋平台输液管道的流体激振是有效的。

Study on Behavior of Flow that Induces Vibration of Pipeline on Offshore Platform

Made a study of the behavior of flow that induced vibration of pipeline on offshore platform, The mathematical model of unsteady, incompressible, viscous flow in a vibrating pipe was established according to the basic theory of oscillating fluid mechanics. The governing equations of flow were decomposed into a system for steady flow and another for flow oscillation, with the equations of the differential coefficients of flow parameters solved by using the parametric polynomial method. Velocity and pressure distributions were obtained for different flow conditions. Numerical results indicate that the flow behavior in the vibrating pipe on offshore platform is strongly affected by fluid properties and the pipe structure, Comparison between numerical result and variational solution shows that the method used in this work is effective for studying flow-induced vibration of pipeline on offshore platform.