| 浮基多体系统自激运动响应的时域分析方法 |
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| 引用本文： | 沈庆,陈徐均,等.浮基多体系统自激运动响应的时域分析方法[J].海洋工程,2002,20(2):7-13. |
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| 作者姓名： | 沈庆 陈徐均 |
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| 作者单位： | 1. 解放军理工大学,工程兵工程学院,江苏,南京,210007
2. 上海交通大学,船舶与海洋工程学院,上海,200030 |
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| 基金项目： | 国家自然科学基金重点资助项目(50039010);中国博士后科学基金资助项目 |
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| 摘 要： | 浮基多体系统上部机构作业时不仅存在多体系统内部各物体间的耦合作用 ,还存在浮基与流场间的耦合作用。本文将浮基在流场中引起的辐射势表示为浮基加速度与时域规范化速度势乘积的卷积形式 ,导出流体动压力及静水系泊恢复力与浮基运动的关系。使用多刚体力学的凯恩方法得到系统的动力学方程。最后给出了在时域中数值求解系统运动响应的具体步骤
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| 关 键 词： | 浮基 流固耦合 多刚体 凯恩方法 |
| 文章编号： | 1005-9865(2002)02-0007-07 |
An analysis method of the self-oscillation in time-domain of a multi-body system with a floating base |
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| SHEN Qing,CHEN Xu jun,LI Yue,CUI Wei cheng.An analysis method of the self-oscillation in time-domain of a multi-body system with a floating base[J].Ocean Engineering,2002,20(2):7-13. |
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| Authors: | SHEN Qing CHEN Xu jun LI Yue CUI Wei cheng |
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| Institution: | SHEN Qing 1,CHEN Xu jun 2,LI Yue 1,CUI Wei cheng 2 |
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| Abstract: | When the upside mechanism of a multi-body system with a floating base works, the coupling interaction exists not only between the interior bodies but also between the floating base and the fluid field. The radiation potentials induced by the motions of the floating base in the fluid field are expressed as the form of convolutions of the accelerations of the floating base and the standardized velocity potentials in time domain. The relationships between the fluid dynamic pressures and the hydrostatic mooring restoring forces and the motions of floating base are deduced. The system dynamic equations are obtained by the Kane method of multi rigid body mechanics. Finally, the procedures of numerical solutions to the system motion responses are presented in time domain. |
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| Keywords: | floating base coupling interaction between fluid and solid multi rigid body Kane method |
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