单断层地质体真三维建模算法  

Algorithm for true-3D modeling of geological body with single-fault

作　　者：李昌领[1] 张虹[1] 朱良峰[2] 

机构地区：[1]中国矿业大学环境与测绘学院,江苏徐州221008 [2]华东师范大学地理信息科学教育部重点实验室,上海200062

出　　处：《计算机工程与设计》2013年第10期3590-3594,共5页Computer Engineering and Design

基　　金：国家自然科学基金项目(40902093)

摘　　要：针对断层地质体三维实体建模中存在的问题,提出了一种能够恰当表达断层地质体的真三维模型-VGTP模型。引进了虚拟地层延伸面的概念,减少了VGTP体元构成的复杂性,建立了一种基于VGTP模型的单断层地质体建模算法;针对一个VGTP体元中包含多种不同质地层体的情况,逐一计算包裹每种地层的多面体;通过一种多面体的四面体剖分算法-切角法,把地层多面体剖分成四面体。该算法屏蔽了建模过程的复杂性,整个建模过程较少用户干预,提高了建模过程的自动化水平,为矿山断层地质体三维建模提供了一种新的思路。To solve problems in solid modeling of geological-body containing fault,a true-3D model named VGTP is presented,which can rightly express geological body with single-fault.The new concept of virtual-stratum-face is introduced and the complexity of VGTP structure is reduced,an algorithm for geological fault modeling based on VGTP is put forward.Considering the fact that a VGTP consists of several different strata,an algorithm is designed to generate one or several polyhedrons to closely wrap up every stratum in the VGTP.Afterwards,by a method named corner-cutting,every stratum-polyhedron is divided into tetrahedrons.During the entire modeling,little intervention is needed,therefore the automation level of this algorithm is enhanced greatly,so a novel thought for 3D modeling of geological body with fault is provided.

关 键 词：断层 地层 VGTP体元模型 虚地层面 多面体 切角法 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]