| 三轴刚性地球自由旋转欧拉角变化数值模拟研究 |
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| 引用本文： | 陈光华.三轴刚性地球自由旋转欧拉角变化数值模拟研究[J].测绘与空间地理信息,2009,32(2). |
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| 作者姓名： | 陈光华 |
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| 作者单位： | 武汉大学,测绘学院,湖北,武汉,430079 |
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| 基金项目： | 武汉大学大学生科研项目 |
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| 摘 要： | 假定地球是一个三轴刚性体,在Euclid空间中做自由旋转.在设定主惯性矩A小于B小于C的情况下,求解欧拉运动方程,得到数值解.计算结果表明:地球在除了自转和自由进动之外,同时还存在着自由章动.章动角会随着时间做周期性变化.重点讨论的是章动角的变化.
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| 关 键 词： | 三轴刚性地球 章动角的变化 主惯性矩 |
Numerical Simulation on the Free Rotation of The Earth as a Triaxial Rigid Body |
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| CHEN Guang-hua.Numerical Simulation on the Free Rotation of The Earth as a Triaxial Rigid Body[J].Geomatics & Spatial Information Technology,2009,32(2). |
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| Authors: | CHEN Guang-hua |
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| Institution: | School of Geodesy and Geomatics;Wuhan University;Wuhan 430079;China |
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| Abstract: | The Earth is taken as a triaxial rigid body,which rotates freely in the Euclidian space.The starting equations are the Euler dynamic equations,with A smaller than B and B smaller than C.The Euler equations are solved,and the numerical results are provided.Calculations show that,besides the self-rotation of the Earth and the free Euler procession of the Earth's rotation,there exists the free nutation:the nutation angle,the angle between the Earth's momentary rotation axis and the mean axis,changes with time,... |
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| Keywords: | triaxial rigid Earth variation of Eulerian angles principal moment of inertia |
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