| 弹性地球自转动力学理论的研究进展 |
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| 引用本文： | 张捍卫,刘学谦,代光萍.弹性地球自转动力学理论的研究进展[J].测绘科学,2004,29(5):83-87. |
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| 作者姓名： | 张捍卫 刘学谦 代光萍 |
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| 作者单位： | 中国科学院测量与地球物理研究所,湖北,武汉,430077;河南省地震局,河南,郑州,450000;云南省昆明市东川区防震减灾局,云南,昆明,654100 |
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| 基金项目： | 教育部重点实验室基金
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国家自然科学基金
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中国科学院知识创新工程项目 |
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| 摘 要： | 地球自转的精确测定是高精度大地参考系建立的理论基础,也是天体测量学、大地测量学和地球物理学共同关注的研究领域。研究了弹性地球自转动力学的基本理论,主要内容包括:修正了固体潮和地球自转对地球惯量张量元影响的表达式;首次给出了高阶岁差章动力矩对地球自转的影响;介绍了大气对地球自转影响的数值积分法,并给出了负荷理论方法;总结了大陆水分布对地球自转影响的数值原理;研究了海洋负荷潮汐对地球自转影响的理论和方法,在推导过程中抛弃了传统的直接数值积分法,直接以负荷引力位为基础,并将海潮潮高引入表达式中,推导出了海潮对地球自转影响的有关公式。本文给出的理论公式可为动力大地测量学和天文地球动力学的研究提供理论参考和依据。
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| 关 键 词： | 地球自转 激发函数 负荷理论方法 |
| 文章编号： | 1009-2307(2004)05-0083-05 |
| 修稿时间： | 2004年6月7日 |
The researchful progress of dynamical theory for elasticity's earth rotation |
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| Abstract: | The precise measurement of Earth rotation is the theoretical foundation for the estcblishment of high precision reference of geodesy,is the commonly investigated field of astrometry,geodesy and geophysics,too.Basic theory of elastic earth rotation have been worked over.Primary contents consist of that:expression for inertial tensor element of earth which was affected by solid earth tide and earth rotation have been modified,for the first time,we have given influence of high order precession and nutation moment on earth rotation,introduced numerical value integral method for influence of atmosphere on earth rotation and method load theory have been given,summarized numerical principle for influence of water distributing of continent on earth rotation.At the same time,we have investigated theory and method for influence of ocean's tide on rotation.In the process of deducing the formula,we did not use classical numerical value integral method,but directly took gravitational potential of ocean loading as a foundation and included height of ocean tides in this expression,we deduced the relevant formulas for ocean tide's influence on earth rotation.Our study in this paper can provide reference and bases for theoretical research of dynamical geodesy and astrogeodynamics. |
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| Keywords: | earth rotation excitated function meyhod of load's theory |
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