Development And Research Of Postprocessing Subsystem For 3D-FSM·DDM Numerical Simulation

The result gained from the 3D FSM·DDM Boundary Element Method(BEM) Core Program is usually a big data file, and it contains huge data. We must take order with this huge data before we can get out useful information from this data. The most original method of processing these data is by manual methods. This method can work if the data file is not too huge, but if the data file is little big this method would meet very big difficulty. The appearance of Computer-Visualization provides the processing of data with a reliable tool. Visualization of BEM data is usually called Post-Processing of BEM. This method makes these huge data visual and intuitionistic by the way of graphics, and provides the system analysis with reference.In those Scientific Computing Visualization software, the most common Visualization methods are isoline graph, colorized nephogram graph and transfiguration graph, etc. Visualization methods in our Post-Processing System have the following function: isoline graph of stress or displacement, colorized nephogram graph of stress or displacement, transfiguration graph and vector graph of displacement. The visualization in the paper and accessory software is just designed for certain section, and the visualization of 3D-face is not involved.The data gained from BEM program is the data of the barycenter of cell, but the building of isoline and nephogram is calculated by the data of node. In order to solve this problem, the Post-Processing System created triangle gridding with the barycenter of cell by the way of treating barycenter as node. In the course of creating triangle gridding, program used the Delaunay-triangle method.The tracing method of isoline used in program is linear interpolation. Fist, calculating out the isoline point from the side of triangle cell with linear interpolation, and then building the isoline by linking the isoline-point with line. This isoline divided the cell triangle into some protruding polygon. Getting average stress value or displacement value of the node of cell first, and...