| Analysis of Wave Loads on A Semi-Submersible Platform |
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| 作者姓名： | QIAN Kun |
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| 作者单位： | Department of Naval Architecture，Dalian University of Technology，Dalian 116024，China，Department of Naval Architecture，Dalian University of Technology，Dalian 116024，China |
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| 摘 要： | For the global and structural fatigue strength analysis of a semi-submersible platform, wave loads under design conditions are calculated by use of the three-dimensional boundary element method. Methods for calculating the forward-speed free-surface Green function are discussed and a computer program with this Green function is developed. According to the special rules, the wave loads under several typical design conditions of the platform are calculated. The maximum vertical bending moment, torsion moment and horizontal split force are determined from a series of contour maps of wave loads for the wave period of 5 to 18 seconds at a certain interval and the wave phase of 0°to 360°at a certain interval. The wave height is determined by the function of wave period with a given exceedance probability. The maximum wave loads under the combination of wave parameters are used as the input of hydrodynamic pressure in the three-dimensional finite element analysis process. The transfer functions of wave loads
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Analysis of Wave Loads on A Semi-Submersible Platform |
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| QIAN Kun and WANG Yanying.Analysis of Wave Loads on A Semi-Submersible Platform[J].China Ocean Engineering,2002,16(3):395-406. |
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| Authors: | QIAN Kun and WANG Yanying |
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| Institution: | Department of Naval Architecture, Dalian University of Technology, Dalian 116024, China Department of Naval Architecture, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | For the global and structural fatigue strength analysis of a semi-submersible platform, wave loads under design con-ditions are calculated by use of the three-dimensional boundary dement method. Methods for calculating the forward-speed free-surface Green function are discussed and a computer program with this Green function is developed. Accordingto the special rules, the wave loads under several typical design conditions of the platform are calculated. The maximumvertical bending moment, torsion moment and horizontal split force are determined from a series of contour maps of waveloads for the wave period of 5 to 18 seconds at a certain interval and the wave phase of O° to 360° at a certain interval.The wave height is determined by the function of wave period with a given exceedance probability. The maximum waveloads under the combination of wave parameters are used as the input of hydrodynamic pressure in the three-dimensionalfinite element analysis process. The transfer functions of wave loads on the platform are used for the fatigue strength anal-ysis of the K-tubular joint and the sub-model of the structure. |
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| Keywords: | wcax and wave load boundary element method faule elemeni method extreme wave loads fatigue strength |
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