分割结点技术和在断层反演中的应用

SPLIT NODE TECHNIQUE AND ITS APPLICATION IN THE INVERSION OF FAULT PARAMETERS

本文介绍了一种将断层参数引入到有限元计算的方法——分割结点技术。利用分割结点技术，可以很方便地将断层参数以边界约束的形式引入到有限元的正演解算中。本文首次利用１０１２个地应力主方向观测数据和中国两期ＧＰＳＡ级网基线观测数据，联合反演了中国及其邻区的三个主要的断层运动参数。

The “Split Node Technique” which can be used in the finite element computations were outlined in the paper. The technique is used to deal with the displacement discontinuity between the two elements. The fault parameters can be introduced as fictitious forces on the nodes adjacent to the split node by using this technique. 1 012 stress orientation observations and two epochs of Chinese A order GPS baseline results were occupied to inverse the parameters of fault movements of three principal fault over the areas of Chinese region and its vicinity.