Ice-Induced Fatigue Analysis by Spectral Approach for Offshore Jacket Platforms with Ice-Breaking Cones  

作　　者：岳前进 刘圆 张日向 屈衍 王瑞学 

机构地区：[1]State Key Laboratory of Structural Analysis of Industrial Equipment,Dalian University of Technology [2]School of Civil and Hydraulic Engineering,Dalian University of Technology

出　　处：《China Ocean Engineering》2007年第1期1-10,共10页中国海洋工程（英文版）

基　　金：The paper was supported by the National 863 High Technology Develpoment Plan Project(Grant No.2001AA602015)

摘　　要：The spectral methods and ice-induced fatigue analysis are discussed based on Miner＇s linear cumulative fatigue hypothesis and S-N curve data. According to the long-term data of full-scale tests on the platforms in the Bohai Sea, the ice force spectrum of conical structures and the fatigue environmental model are established. Moreover, the finite element model of JZ20-2MSW platform, an example of ice-induced fatigue analysis, is built with ANSYS software. The mode analysis and dynamic analysis in frequency domain under all kinds of ice fatigue work conditions are carded on, and the fatigue life of the structure is estimated in detail. The methods in this paper can be helpful in ice-induced fatigue analysis of ice-resistant platforms.The spectral methods and ice-induced fatigue analysis are discussed based on Miner＇s linear cumulative fatigue hypothesis and S-N curve data. According to the long-term data of full-scale tests on the platforms in the Bohai Sea, the ice force spectrum of conical structures and the fatigue environmental model are established. Moreover, the finite element model of JZ20-2MSW platform, an example of ice-induced fatigue analysis, is built with ANSYS software. The mode analysis and dynamic analysis in frequency domain under all kinds of ice fatigue work conditions are carded on, and the fatigue life of the structure is estimated in detail. The methods in this paper can be helpful in ice-induced fatigue analysis of ice-resistant platforms.

关 键 词：ice-resistant platform spectral methods ice force spectrum fatigue analysis 

分 类 号：P75[天文地球—海洋科学] TV135[水利工程—水力学及河流动力学]