【摘要】 本文用相关分析的方法获得了三次地震波沿地表传播的视波速,讨论了地震动旋转分量的物理概念和有限差分法,并用有限差分法对行波法的精度进行了检验。研究结果表明:1.不同地震波通过同一场地时沿地表传播的视波速有很大不同;2.在本文所研究的频带内,行波法有相当的精度;3.行波法的精度与震中距有关。更多还原

【Abstract】 In the present paper, the accuracy of travelling-wave method has been studied.As an exact method, the finite-difference method has been employed to check the accuracy of travelling-wave method. The results suggest. ( 1 ) the apparent velocities by which different earthquake waves pass through the same site are different from each other; (2) In. the frequency range chosen in the paper, the rotational components from travelling-wave method have good accuracy; (3)the accuracy of travel ling-wave method is related to epicentral distance.更多还原