首页> 外文学位 >P-version refinement studies in the boundary element method.
【24h】

P-version refinement studies in the boundary element method.

机译:边界元法中的P版本细化研究。

获取原文
获取原文并翻译 | 示例

摘要

Two weakly singular forms of the hypersingular boundary integral equation (HBIE) in three-dimensional potential theory are presented. The hypersingular and singular integrals in the HBIE were regularized, either over the entire boundary of the domain using a linear state representation of the density function, or locally in the vicinity of the source point, expressing the added back terms as a combination of weakly singular geometric curvature integrals, path integrals transformed by Stokes' theorm and differential solid angle integrals. A new computational strategy which follows an external limit to the boundary of the domain is introduced for the locally regularized boundary element method (BEM). With this approach, the free term is computed as part of the regularization and no special treatment is required for corners and edges. The regularized integrals and the added back terms are computed using numerical integration schemes.;The weakly singular boundary integral forms were implemented for two geometries, a tetrahedron obviously dominated by edges and corners and a sphere chosen to demonstrate generality for arbitrary curved surfaces. The results show significant improvements in accuracy with every p-version refinement. For a given element order the locally regularized form is shown to be more accurate than the globally regularized form.
机译:提出了三维势能理论中超奇异边界积分方程(HBIE)的两种弱奇异形式。 HBIE中的超奇异和奇异积分通过使用密度函数的线性状态表示在域的整个边界上或在源点附近局部进行正则化,将添加的后项表示为弱奇异的组合几何曲率积分,由斯托克斯定理转换的路径积分和微分立体角积分。针对局部正则化边界元方法(BEM)引入了一种新的计算策略,该策略遵循对域边界的外部限制。使用这种方法,可以将自由项作为正则化的一部分进行计算,并且不需要对角和边进行特殊处理。使用数值积分方案计算正则化积分和加回项。对于两个几何实现了弱奇异边界积分形式,明显由边和角主导的四面体以及为证明任意曲面的通用性而选择的球体。结果表明,每次p版改进都会显着提高精度。对于给定的元素顺序,显示的局部正则形式比全局正则形式更准确。

著录项

  • 作者

    Arjunon, Sivakkumar.;

  • 作者单位

    Tennessee Technological University.;

  • 授予单位 Tennessee Technological University.;
  • 学科 Engineering Mechanical.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 61 p.
  • 总页数 61
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;
  • 关键词

  • 入库时间 2022-08-17 11:38:29

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号