Study On The Data Model Of 3DSIS For Real-Time Visualization And Numerical Simulation

The most concerned problems in geotechnical engineering are the analysis and tectonic interpretation of geological structures and the stability analysis of rock and (or) soil medium. The available methods to solve the two problems are 3D visualization of geological structures and numerical simulations. However, the most of geological models based on visualization technique or database technique are difficult to mechanical analysis, while the current numerical simulations are difficult in geological modeling, or rather can't realize. Aiming at the situation, especially the lacks of 3DSIS data model which can't realize real-time visualization and is difficult to mechanical analysis, this paper present a geological model went by the name of NMTINF_BR for real-time visualization and numerical simulation. The main jobs of this paper are as follows:1. The systematical study on geological features, 3D geological model, visualization technique and automatic mesh generation technique indicates that the non-manifold B-Rep can not only represent the complex geological structures, but also provide the geomechanical model for numerical simulations.2. The data model (NMTINF_BR) in addressing the representation of non-manifold complex geological structures consists of decomposing them into simpler manifold (or manifold with boundary) triangular irregular network and (or) single-vertex and (or) wire edge, and using a two-level representation to stitch them together.3. The lower level data structure represents topological structure of triangular irregular network. NMTINF_BR introduces the non-manifold information into quad-edge data structure. In this way, the elegant topological operations of quad-edge data structure are preserved, while the representation of manifold and non-manifold objects is skillfully integrated.4. The higher level data structure stitches the triangular irregular networks and (or) single-vertexes and (or) wire edges together. It represents topological relationships of the lower level components.5. The implementation of NMTINF_BR data structure is object-oriented design in C++, and...