基于Tessmer变换的起伏地形三维稳定电流场数值模拟  

A Numerical Modeling of 3D Stable Current Field in the Fluctuating Surface Topography Based on Tessmer Transform

作　　者：韩江涛[1] 刘国兴[1] 

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026

出　　处：《吉林大学学报（地球科学版）》2008年第S1期1-3,7,共4页Journal of Jilin University：Earth Science Edition

基　　金：国家"863"项目(2006AA06Z109)

摘　　要：在地球物理场数值模拟过程中,起伏地表始终是一个难以解决的问题。采用Tessmer变换对三维起伏地形进行整体间接"曲化平"方法处理,将起伏地形表面转换为水平表面,在变换后的计算域中采用有限差分法对直流电场进行数值模拟。计算结果表明,这种方法对起伏变化比较平缓的地形具有很好的模拟效果。In the numerical modeling of geophysical field,fluctuating surface has always been a problem difficult to resolve,In this paper,we use Tessmer transform to disposal 3D fluctuating surface with the method of conversion of curved-surface data into horizontal-plane data,we transform the fluctuating surface into horizontal surface and use finite-difference method to model it in the calculation field after transform.The results show that.this method shows a satisfactory results in modeling topography undulating changes gently.

关 键 词：Tessmer变换 起伏地形 稳定电流场 数值模拟 

分 类 号：P631.3[天文地球—地质矿产勘探]