| 刘永军,李宏男.有限元应力场可视化的一种新方法[J].计算力学学报,2003,20(2):195~198 |
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| 有限元应力场可视化的一种新方法 |
| New method for visualization of FEM stress fields |
| 修订日期：2001-03-12 |
| DOI：10.7511/jslx20032039 |
| 中文关键词: 科学可视化 有限元 应务场 |
| 英文关键词:scientific visualization,FEM,stress field |
| 基金项目:辽宁省教委课题(992721687)资助项目. |
| 刘永军 李宏男 |
| [1]沈阳建筑工程学院土木工程系，沈阳110015 [2]大连理工大学土木建筑学院，大连116024 |
| 摘要点击次数: 1026 |
| 全文下载次数: 9 |
| 中文摘要: |
| 提出一种画二维和主等参单元彩色云图的新方法。首先，根据单元覆盖象素的数量在正方形母元上均匀布置足够数量的点。第二，用单元的结点坐标、结点应力以及等参扦值函数，插值计算这些点的总体坐标及应力。第三，根据预先设立的颜色与应力之间的函数关系，求出每个点对应的象素的颜色。最后，逐个把单元覆盖的象素设置为求出的颜色。与消陷技术以及画家算法结合起来，这种方法可以清晰画出三维应力场的云图。实例表明，本文方法简单、准确，易于实现。 |
| 英文摘要: |
| A new method for stress representation by colored patterns on two\| or three\|dimensional isoparametric surfaces is presented. Firstly, the enough points are arranged evenly on a square parent element according to the number of pixels spanned by an element on the screen. Secondly, the global coordinates and stress values of the points are calculated by using standard isoparametric interpolations, the node coordinates and the known node stresses. Thirdly, the color values of corresponding pixels of the points are computed on basis of the present function relations between color and stress. Lastly, the pixels are set to the calculated colors one by one. In 3D case, the method is combined with hidden surface removal techniques and painter's algorithm to generate easily perceptible pictures. Some examples demonstrate that the method is simple, efficient, accurate and easily implemented. |
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