拖航工况下半潜平台撑杆对波浪砰击的敏感性  

Sensitivity of Semi-submersible Platform Brace for Wave Slamming under Towing Condition

作　　者：安康 高明月 姚智 李良碧[1] 霍发力[1] AN Kang;GAO Mingyue;YAO Zhi;LI Liangbi;HUO Fali(School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Jiangsu Zhenjiang 212003,China)

机构地区：[1]江苏科技大学船舶与海洋工程学院,江苏镇江212003

出　　处：《船舶工程》2020年第9期133-141,共9页Ship Engineering

基　　金：自然科学基金基础研究计划(青年基金项目)(BK20170575);国家自然科学基金(52071161)。

摘　　要：半潜式平台拖行过程中,其撑杆等细长结构承受的波浪砰击对结构的安全性影响较大,相关船级社规范明确要求在进行结构分析时需考虑波浪砰击载荷。非定常的计算流体力学(CFD)方法能较为准确地解决复杂的黏性干涉效应、波浪爬升、波浪破碎和波浪砰击等实际工程问题。因此,以982半潜式海洋平台为研究对象,结合水池物理模型试验结果,对平台撑杆在拖行工况下遭受的波浪砰击进行研究。主要对半潜平台撑杆在3种流速、风速和斜浪的拖航工况下受到的砰击压力的敏感性进行分析,阐述撑杆在波浪砰击作用下的瞬态砰击压强分布情况,得到波浪砰击压力危险区域;同时,给出拖航工况下撑杆砰击压力系数的变化规律,为分析预报半潜式平台撑杆在复杂的拖航海况下受到的砰击压力提供参考。The wave slamming on the slender structures such as brace have an important influence for the structure safety during the towing process of semi-submersible platform.The relative class societies clearly requires that the wave slamming should be considered in the structure analysis.The unsteady Computational Fluid Dynamics method(CFD)can accurately solve the complex actual engineering problems such as viscous interference effect,wave climbing,wave breaking and wave slamming.Therefore,taking 982 semi-submersible floating platform as the study object,combining with the tank physical model test results,the wave slamming of platform struts under towing conditions is studied.The sensitivity of the wave slamming pressure with three different current speed,wind speed and oblique waves condition under the towing conditions is mainly analyzed.The transient pressure distribution of the brace under wave slamming is described and the wave slamming pressure dangerous areas are gained.Meanwhile,the change rules of the slamming pressure coefficient of the brace under the towing conditions is conducted,which provides reference for analyzing and predicting the slamming pressure of the semi-submersible platform brace in the complex towing conditions.

关 键 词：半潜式平台 数值水池 动态重叠网格方法 流域体积域方法 波浪砰击 

分 类 号：U663.2[交通运输工程—船舶及航道工程]