摘要
贴体网格在地质数值模拟中具有广阔的应用前景,为解决贴体网格生成时边界离散问题,提出了最大长度准则和最大面积准则,把曲线逼近和曲面网格优化问题转化为数学优化问题,为求解该问题,提出了改进的单粒子优化算法.试验表明,最大长度准则和最大面积准则的优化效果好于常规方法;以改进的单粒子优化算法求解该问题时,计算效率是智能单粒子优化算法的30倍左右(节点量为200),从而实现最大长度准则和最大面积准则在贴体网格生成中的应用.针对最大面积准则优化曲面网格不能控制网格步长的情况,提出了限定步长的网格优化算法,使网格步长合理化,并通过实例验证了该算法的有效性.研究成果提供了生成贴体网格时边界优化准则和求解方法,对今后复杂边界的贴体网格生成具有重要意义.
Body-fitted grids have a wide application prospect in numerical simulation of geology. In order to solve the boundary discrete problem in generation of body-fitted grids, we put forward the maximum length criteria and the maximum area criteria which transform the curve approximation and the surface grid optimization problems into a mathematical optimization problem. We further propose a single particle optimization algorithm Tests show that the maximum length criteria and the maximum optimization effects than the conventional methods. The calculation single particle optimizer is thirty times of the intelligent single parti when solving this problem, and it achieves the application goal of th for solving area effici cle o e ma this problem. criteria have better ency of the improved ptimizer （200 nodes） ximum length criteriaand the maximum area criteria in generating body-fitted grids. Because the maximum area criteria cannot control the grid step length, we propose a limited step length grid optimizer which makes the step length more reasonable. We have tested and verified the effectiveness of this algorithm. The research results provide boundary optimal criteria and the solutions, which have important significance in generating body-fitted grids with complex boundaries in the future.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第4期1275-1283,共9页
Chinese Journal of Geophysics
基金
国家重点基础研究发展规划"973"项目"中国西部叠合盆地深部有效碎屑岩储层成因机制与发育模式"(2011CB201104)
国家重大专项"准噶尔盆地深层火山岩储集体形成演化与分布预测"(2011ZX05008-003-40)联合资助
关键词
贴体网格
最大长度准则
最大面积准则
改进的单粒子优化算法
限定步长
Body-fitted grid
Maximum length criteria
Maximum area criteria
Improved singleparticle optimizer
Limited step length
