【摘要】 本文利用Hamilton方法研究弹性地球自转运动，采用地球模型PREM参数，给出了形状轴的章动序列．结果表明我们的方法是可行的，计算是可靠的．弹性地幔对地球章动的影响仅在毫角秒量级上，它相对液核对地球竟动的影响要小得多．更多还原

【Abstract】 The rheological parameters for the Earth model PREM are adopted in this work tostudy the rotahonal motion of an elastic Earth. The Hamiltonian theory is applied tocalculate the nutation series for the figure axis. The results show that the method isfeasible and the numerical values are reliable. The influence of the elashc mantle onthe Earth’s nutation is only in the milliarcsecond order of magnitude and is muchsmaller than that of the liquid core.更多还原