Algorithm for mixed meshing multiple trimmed parametric surfaces for finite element analysis 多个裁剪参数曲面的有限元混合网格剖分法
Using the above algorithms , this thesis proposes two efficient algorithms for evaluating parametric surfaces 根据以上算法,本文提出了对参数曲面快速求值的两种新方法
The former method is parametric surface integral and the latter is to triangulate closed surface based on nurbs . ( 4 ) the key technique in probabilistic damaged stability calculation is discussed ( 4 )对概率破舱稳性计算中多舱组合破损时船体的浮态与稳性计算发生异常的原因进行了研究。
The problems on parameterization of implicit algebraic surfaces and inversion of parametric surfaces are discussed and the inversion equations for some nurbs surfaces are derived in detail 探讨隐式曲面参数化及cad超曲面重构技术研究及其应用参数曲面反演问题,具体导出了一些nurbs曲面的反演方程。
Secondly , based on nurbs curves approximation algorithm , a nurbs surface approximation algorithm on discrete data sets is given . thirdly , a shape - preserving parametric surface interpolation to data set is given 2基于所给的nurbs曲线的逼近算法,建立了带插值条件的离散点集的nurbs曲面的逼近算法。