摘要
随着半潜式平台的长期海上服役,平台的基本设计参数会发生变化,如仍基于原始设计参数对平台进行分析将影响结果的准确性。本文以半潜式平台服役中易发生变化的基本参数(平台排水量、重心高度和三个自由度回转半径)作为修正参数,以平台横摇、纵摇和垂荡自由度的方差和波频功率谱密度构建目标函数,建立可依据实测数据的半潜式平台贝叶斯参数修正方法。以我国某半潜式平台实测数据为例,开展平台的参数修正研究,并基于修正后的参数对平台多年一遇环境荷载下的响应进行对比评估。
With the long-term service of a semi-submersible platform at sea,the basic design parameters of the platform will change.If the platform is still analyzed based on the original design parameters,the accura⁃cy of the results will be affected.In this paper,the basic parameters(displacement,center of gravity height and three-degree-of-freedom radius of rotation)that are easy to change during the service of a semi-sub⁃mersible platform were taken as the updating parameters,the objective function was constructed by the vari⁃ances,and wave frequency power spectral density of platform roll,pitch and heave,and a Bayesian parameter updating method of semi-submersible platform based on the monitoring data was established.With the moni⁃toring data of a semi-submersible platform in China taken as an example,the parameter updating of the plat⁃form was carried out,and based on the updated parameters,the response of the platform under a multi-year return period environmental load was compared and evaluated.
作者
李松
武文华
姚伟岸
LI Song;WU Wen-hua;YAO Wei-an(State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,Dalian University of Technology,Dalian 116024,China;Ningbo Research Institute of Dalian University of Technology,Ningbo 315000,China)
出处
《船舶力学》
EI
CSCD
北大核心
2024年第2期179-190,共12页
Journal of Ship Mechanics
基金
国家自然科学基金资助项目(U1906233)
山东省重点研发项目(2019JZZY010801)
高等学校基本科研业务费资助项目(DUT20ZD213,DUT20LAB308)。
关键词
半潜式平台
原型监测
贝叶斯
参数修正
代理模型
semi-submersible platform
prototype monitoring
Bayesian
parameter updating
surrogate model
