球体散射场计算前置处理中的球面剖分算法  

Algorithm of spherical surface subdivision of prepositive disposal in sphere electromagnetic scattering

作　　者：蒋泽[1] 刘湘梅[1] 邵建兴[1] 侯维娜[1] 高文利[2] 

机构地区：[1]重庆邮电大学光电工程学院,重庆400065 [2]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000

出　　处：《计算机工程与应用》2009年第19期213-216,共4页Computer Engineering and Applications

基　　金：国家高技术研究发展计划(863)(No.2006AA06Z136)~~

摘　　要：基于球体电磁散射计算,提出了一种新型高精度球面剖分算法——球面三角自适应剖分算法。通过阐述新算法的基本思想、步骤和特点,从几何变形、收敛性和剖分单元数等三个方面,对该算法剖分模型与QTM模型进行了形状特性和剖分复杂度的定量比较分析;针对球体散射计算实例,验证了新算法的正确性与有效性。结果表明:相对于QTM模型,新算法剖分模型的几何变形小、相似程度高、所需剖分单元少,并且具有较高的计算精度。Based on the electromagnetic scattering,a new and highly precise spherical surface subdivision algorithm-the self- adaptive spherical triangle subdivision algorithm is presented.Firstly,the basic idea,process and characteristics of the new algorithm are introduced.Then,from three aspects,i.e.geometry distorts,convergent character,total unit quantity,the new algorithm subdivision model and the QTM （Quaternary Triangular Mesh） model are quantitatively analyzed for their shape features and subdivision complexity.At last,the availability of the new algorithm is verified by a sphere scattering instance.The result shows that comparing with the QTM model,the new subdivision model has lower geometry distortions,higher similarity degree and fewer subdivision units,and also has high computation precision.

关 键 词：球面三角 自适应剖分 四元三角网模型 几何变形 收敛性 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]