| Truss Spar平台在波流联合作用下运动响应预报方法比较 |
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| 引用本文： | 许国春,石 凡,刘肖佐,朱克强.Truss Spar平台在波流联合作用下运动响应预报方法比较[J].海洋工程,2019,37(3):102-110. |
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| 作者姓名： | 许国春 石 凡 刘肖佐 朱克强 |
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| 作者单位： | 宁波大学 海运学院,浙江 宁波 315211,宁波大学 海运学院,浙江 宁波 315211,宁波大学 海运学院,浙江 宁波 315211,宁波大学 海运学院,浙江 宁波 315211 |
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| 基金项目： | 国家自然科学基金资助项目(51579056,51739001);宁波大学人才引进/ 校基金项目(421706650,421906922) |
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| 摘 要： | 基于细长体水动力模型比较了Truss Spar平台在波流联合作用下运动响应预报的三种方法。分别采用波流耦合、速度叠加及力叠加计算Truss Spar平台在波流联合作用下的水动力载荷,根据流场水质点运动规律和Truss Spar外部形状特点,分段高效计算水动力载荷。利用Runge-Kutta-Fehlberg方法求解刚体非线性运动方程得Truss Spar在波流场中的运动响应。研究结果表明力叠加法所预报的Truss Spar纵荡和纵摇运动明显大于其他两种方法的相应运动响应预报结果,而波流耦合法与速度叠加法所预报的纵荡与纵摇运动响应幅值相当,三种方法所预报的垂荡运动响应的大小取决于具体波流参数。
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| 关 键 词： | Truss Spar 运动预报 细长体模型 数值研究 |
Numerical comparison of motion response prediction methods of Truss Spar platform in waves and currents |
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| XU Guochun,SHI Fan,LIU Xiaozuo and ZHU Keqiang.Numerical comparison of motion response prediction methods of Truss Spar platform in waves and currents[J].Ocean Engineering,2019,37(3):102-110. |
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| Authors: | XU Guochun SHI Fan LIU Xiaozuo and ZHU Keqiang |
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| Institution: | Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China,Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China,Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China and Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China |
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| Abstract: | Three methods used for predicting Truss Spar motions were investigated in waves and currents based on the slender hydrodynamic model. The hydrodynamic loads of Truss Spar due to waves and currents were calculated by wave-current coupling, velocity superposition and force superposition. According to the kinematic characteristics of water particle in fluid field, the compotation of hydrodynamic loads was efficiently completed by a segment scheme. Truss Spar motion responses were predicted by a set of nonlinear equations of the rigid body, which was solved by Runge-Kutta-Fehlberg method. The results indicate that the force superposition method can predict relatively large surge and pitch motions, whereas the wave-current coupling method and velocity superposition method present almost the same surge and pitch motions. However, the predicted heave results of the three methods depend on specific wave and current parameters. |
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| Keywords: | Truss Spar motion prediction slender model numerical research |
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