Dynamic Stress Analysis of the Leg Joints of Self-Elevating Platform

Abstract：Since a self-elevating platform often works in water for a long time, the lattice leg is largely influenced by wave and current. The amplitude of leg joint stresses is a very important factor for the fatigue life of the platform. However, there are not many researches having been done on the mechanism and dynamic stress analysis of these leg joints. This paper focuses on the dynamic stress analysis and suppression methods of the leg joints of self-elevating platforms. Firstly, the dynamic stresses of the lattice leg joints are analyzed for a self-elevating platform by use of the 5th-order Stokes wave theory. Secondly, the axial and bending stresses are studied due to their large contributions to total stresses. And then, different joint types are considered and the leg-hull interface stiffness is analyzed for the improvement of the joint dynamic stress amplitude. Finally, some useful conclusions are drawn for the optimization design of the self-elevating platform. 作者： Author： HUANG Zhao-yu[1]  TANG Wen-yong[2]  WANG Yi[3]  WANG Wen-tao[3] 作者單位： State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University,Shanghai 200030, China;Shanghai Zhenhua Heavy Industry Co. Ltd, Shanghai 200125, ChinaState Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University,Shanghai 200030, ChinaShanghai Zhenhua Heavy Industry Co. Ltd, Shanghai 200125, China 期 刊： 中國(guó)海洋工程(英文版)   ISTICEISCI Journal： CHINA OCEAN ENGINEERING 年，卷(期)： 2011, 25(2) 分類號(hào)： P75 Keywords： self-elevating platform    leg joint    dynamic stress    stress amplitude improvement    機(jī)標(biāo)分類號(hào)： P5 TH1 機(jī)標(biāo)關(guān)鍵詞： Stress Analysis    dynamic stress analysis    optimization design    fatigue life    joint types    methods of    interface    different    wave    However    focuses    works    total    paper    drawn    time    long 基金項(xiàng)目： This study was supported by the Shanghai Science Foundation of Important Projects for Post Doctoral Research,China

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