Spar平台月池水晃动的等效力学模型及模型参数研究  

STUDYON THE EQUIVALENT MECHANICS MODEL AND MODEL PARAMETERS OF SLOSHING MOTION OF WATER INSIDE THE MOONPOOL OF A SPAR PLATFORM

作　　者：刘利琴[1] 满金双 周斌 张若瑜[1] 

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300072 [2]中海油能源发展采油服务公司,塘沽300457

出　　处：《动力学与控制学报》2015年第5期355-360,共6页Journal of Dynamics and Control

基　　金：国家自然科学基金资助项目(51179125);天津大学自主创新基金~~

摘　　要：研究深海Spar平台月池水晃动的等效力学模型,确定模型参数.基于势流理论推导了月池内水体运动的动力学方程,建立了月池内水体晃动的等效单摆模型.采用ANSYS软件建立模型并进行网格划分,采用Matlab软件进行数值计算.运用Galerkin方法求解水体晃动的固有频率、模态函数以及势函数离散解,确定等效单摆模型的模型参数.对比分析了数值模拟结果与解析解,验证了本文计算方法的正确性.建立了不同月池水高度的等效力学模型参数库,为进一步研究平台-月池内流体的耦合运动奠定了基础.This paper studied the equivalent mechanics model of sloshing motion of water inside the moonpool of a deep sea Spar platform,and the model parameters were calculated. The dynamic equations of water inside the moonpool were derived based on the potential flow theory. The equivalent pendulum models of the sloshing motions of water inside the moonpool were established. ANSYS software was used to set up model and mesh,and the Matlab software was used to carry out the numerical calculation. The Galerkin method was used to solve the natural frequencies,modal functions and discrete solutions of the potential function of the sloshing motions,and the model parameters of the equivalent pendulum were calculated. The validity of the calculating method was verified by comparing the numerical simulation results with the analytical results. The parameter library of the equivalent mechanics model was established considering the different water heights of the moonpool. This lays the foundation for studying the coupling motions between the platform and water inside the moonpool.

关 键 词：SPAR平台 月池 有限元 等效力学模型 

分 类 号：O352[理学—流体力学]