基于GiD的有限元前处理和后处理可视化  

Visualization of the pre-and post-processing in finite element analysis based on GiD

作　　者：汤井田[1] 公劲喆[1] 

机构地区：[1]中南大学信息物理工程学院,湖南长沙410083

出　　处：《地球物理学进展》2010年第1期186-195,共10页Progress in Geophysics

基　　金：国家自然科学基金项目(40874072)资助

摘　　要：目前在地球物理数值计算领域,尚缺乏简便易行的可视化的前处理和后处理方法.这使得复杂计算模型较难建立和分析,也使得已有计算程序较难与生产实际相结合.本文以直流电法三维有限元数值模拟前后处理为例,研究了通用三维前后处理软件GiD在地球物理有限元前处理和后处理中的应用方法.通过编写用户自定义"问题类型",建立并输出了可用于已有有限元计算程序的初始模型.计算过程结束之后,通过调用GiDpost后处理函数库,使计算程序方便的生成特定格式的后处理文件.最后,将前处理、计算和后处理功能整合,成功实现整个过程的图形化.与目前其他地球物理有限元前后处理方法相比,此套方法效率高、简单易行,最重要的是通用性好,可适用于各种已有的地球物理有限元计算程序.In the field of computational geophysics, simple but easy approaches for pre- and post-processing of complex geology models are still lack. This brings big difficulty for dealing with practical complicated problems. Through an example of 3D finite element numerical simulation for the DC method, the procedures of finite element pre-and post-processing in geophysics based on the universal 3D modeling software named GiD are studied. By writing the codes of ＂Problem Type＂, the initial model which can be used in the existing finite element calculation software was built and outputted. After calculation, by using GiDpost library, the files used for post-processing in GiD can be outputted easily. Finally, the pre-processing, calculation and post-processing procedures were successfully integrated in a visualized user interface in GiD. Comparing with other methods used for pre and post-processing in geophysics, the method described in this paper is move simple, efficient and effective. Moreover, it is universal and adaptive for all types of finite element method numerical simulation programs used in geophysics.

关 键 词：GID 地球物理 有限元 前处理 后处理 

分 类 号：P631[天文地球—地质矿产勘探]