引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 215次   下载 178 本文二维码信息
码上扫一扫!
分享到: 微信 更多
一种基于邻域作用力的三维网格平滑方法
王海起1, 彭佳琦1, 王艺1, 董倩楠1, 车磊1, 龚蔚青2
作者单位
王海起1, 彭佳琦1, 王艺1, 董倩楠1, 车磊1, 龚蔚青2 1. 中国石油大学地球科学与技术学院, 山东青岛 266580
2. 中国石化石油勘探开发研究院, 北京 100083 
摘要:
针对以不规则六面体为基元的三维网格模型在对三维区域边界表达时存在锯齿现象,在保持原有网格拓扑结构不变的情况下,提出种基于离散属性数据的邻域网格相互作用力平滑方法。受磁铁"同性相斥"物理特性的启发,将三维网格模型共用顶点的邻域网格体元素根据属性值划分为不同的体块,体块之间具有相斥的作用力,根据体块对顶点的作用合力方向和大小确定网格顶点平滑移动的方向和距离。实际应用表明平滑存在着"拐点"现象,平滑系数取值接近拐点时平滑效果较好,取值偏大或偏小评价指标性能下降。
关键词:  六面体网格  锯齿效应  三维平滑  邻域网格  作用力
DOI:10.3969/j.issn.1673-5005.2017.06.009
分类号:
基金项目:国家自然科学基金项目(41471322);山东省自然科学基金项目(ZR2012DM010)
A 3D meshes smoothing method based on neighborhood forces
WANG Haiqi1, PENG Jiaqi1, WANG Yi1, DONG Qiannan1, CHE Lei1, GONG Weiqing2
Abstract:
Hexahedral meshes are widely used to build three-dimensional (3D) geological and reservoir models. However, this voxel model, derived from rectangular grid, has jagged effects when modeling the boundary of a 3D region, which is not consistent with actual geological phenomena. To address the jagged-edge phenomena, under the condition of keeping original topology structure invariable, a smoothing algorithm is proposed based on the forces of neighborhood meshes. The algorithm is inspired by "poles repel" derived from physical properties of a magnet, and the neighboring meshes of a smoothed vertex are divided into different blocks according to their attributes. The blocks have repulsive force. The direction and magnitude of resultant force determine the vertex direction and distance of smoothing movement. The practical application shows that there is an inflection point for smoothing performance and the smoothing performs better when the smoothing coefficient closes to the inflection point; or conversely, the performance is decreasing when smoothing coefficient is away from the inflection point.
Key words:  hexahedral mesh  jagged effect  3D smoothing  neighborhood mesh  force
版权所有 中国石油大学学报(自然科学版)编辑部 Copyright©2008 All Rights Reserved
主管单位:中华人民共和国教育部 主办单位:中国石油大学
地址: 青岛市黄岛区长江西路66号中国石油大学期刊社 邮编:266580 电话:0532-86983496 E-mail: journal@upc.edu.cn
本系统由:北京勤云科技发展有限公司设计