| 基于线框架模型的三维地质断层结构模型及其构建技术 |
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| 引用本文： | 朱良峰,陈国良,吴信才,刘修国.基于线框架模型的三维地质断层结构模型及其构建技术[J].地学前缘,2007,14(2):276-282. |
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| 作者姓名： | 朱良峰 陈国良 吴信才 刘修国 |
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| 作者单位： | 1. 华东师范大学,地理信息科学教育部重点实验室,上海,200062;中国地质大学(武汉)信息工程学院,湖北,武汉,430074
2. 中国地质大学(武汉)信息工程学院,湖北,武汉,430074 |
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| 基金项目： | 国家高技术研究计划发展专项经费
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上海市自然科学基金 |
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| 摘 要： | 基于地质断层构造的特点,文中提出了一种适合三维断层模拟的数据模型——线框架模型,并基于该数据模型详细描述三维断层结构模型的构建方法,实现了从层面结构的地质模型向块体结构的地质模型进行自动转换的关键算法。线框架模型以方向线框架来表达地质模型的骨架,以方向TIN网来表达地质模型的血肉,具备地质断层结构模型所要表达的各种几何元素与拓扑关系。基于线框架模型的三维地质断层构模技术将地质界面之间的交切在地质界面三角网形成之前就进行处理,将面与面之间的切割操作简化为线与线之间的操作,这种方法不仅能有效地减轻断层地质体构模的复杂程度,而且可以将线与线之间的交线作为地质界面三角网构建时的约束边,从而有效地保证了地质界面之间交切关系的正确性。
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| 关 键 词： | 三维地质建模 断层结构模型 线框架模型 块体结构 地质断层 可视化 |
| 文章编号： | 1005-2321(2007)02-0276-07 |
| 修稿时间： | 2005年8月8日 |
3-D geological fault model and its construction based on wire-frame model |
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| Zhu Liangfeng,Chen Guoliang,Wu Xincai,Liu Xiuguo.3-D geological fault model and its construction based on wire-frame model[J].Earth Science Frontiers,2007,14(2):276-282. |
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| Authors: | Zhu Liangfeng Chen Guoliang Wu Xincai Liu Xiuguo |
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| Abstract: | A wire-frame model is a type of data model based on the characteristics of faults, which is developed in order to model and visualize 3-D complex structures containing faults. A novel modeling is presented to solve the puzzle of a 3-D geological fault model.An algorithm for automatic conversion from completed stratified structure to coherent 3-D geological blocks is realized. The wire-frame model that uses the directed wire-frame to express the skeleton of geological model and the directed Triangulated Irregular Networks(TIN) to express the body of geological model is suitable for the geometric elements and topological relationship between geological bodies. During the 3-D modeling of a fault, the operation of geological surfaces is carried out before the construction of TIN. This improvement simplifies the clip operation between the geological surfaces, reduces the modeling complexity, and ensures the correctness of the intersection relationship between stratum surface and fault plane. |
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| Keywords: | 3-D geological modeling fault model wire-frame model block structure geological fault visualization |
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