基于线框单元体的三维闭合地质块体构建方法  

3D Sealed Geological Block Modeling with Wire Frame Component

作　　者：侯卫生[1] 吴信才[1] 刘修国[1] 

机构地区：[1]中国地质大学信息工程学院

出　　处：《吉林大学学报（地球科学版）》2007年第5期1047-1051,共5页Journal of Jilin University：Earth Science Edition

基　　金：国家"863"计划项目(2001AA135170)

摘　　要：为能充分利用空间数据模型中的拓扑关系来实现三维闭合块体的构建,引入了表示简单块体轮廓的线框单元体概念来组织三维模型间各要素之间的拓扑关系;并以此为基础给出了以方向边和方向三角形作为基本识别单元进行三维简单形体的自动识别方法。应用实例表明:利用该方法不仅可以准确构建复杂地质块体,还可以准确描述块体内各要素的拓扑关系,再现局部特殊地质现象,如小断层(悬面)等。为三维地质模型在地震正演模拟、射线追踪等分析应用方面提供了基础。To construct 3D geological blocks with the topology of sp wire frame component describing the outline of simple block is presented ments in the 3D geological model. With the help of the notion, an aut proach is proposed, in which the directed edge and directed triangle are .simulation result illustrated that the approach presented not only can mod atial data model, the notion of to organize the topology of eleomatic block identification ap- used as basic search unit. The el complex blocks, but exactly represent the topology among the elements in the block and local geological phen small fault （free face）. The method provides base of the application of 3D geology model omena to sels also can such as mic forward modeling, ray tracing, etc.

关 键 词：线框单元体 闭合三维地质形体 方向边 方向三角形 

分 类 号：P628.3[天文地球—地质矿产勘探]