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边界表述
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  boundary presentation
    Boundary Presentation of 2D Finite Element ModelBased on Bezier and BSpline Curves
    基于 Bezier 曲线和B样条曲线的二维有限元模型边界表述
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    オhe paper discusses the essential problems that Bezier and Bspline curves are applied to 2D structure boundary presentation. It provides some useful ideas for selecting proper curve description in different cases by analysing and comparing of algorithm and feature of Bezier and Bspline curves. As an engineering example, it also gives the structure boundary desceription of the ceramic piston crown of a diesel engine.
    对Bezier曲线和B样条曲线用于二维结构边界表述基本问题进行了探讨.通过对Bezier曲线和B样条曲线的生成算法与特点进行分析与比较,为不同应用场合选用合适曲线进行描述提供了依据,并给出了内燃机活塞的结构边界描述的应用实例.
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  “边界表述”译为未确定词的双语例句
    In this paper,the definition of mesh control information are given with the topological elements in the B\|reps of the planar domains, node space function is used to control the changes of element size.
    利用任意平面域边界表述中的拓扑要素定义网格的控制信息,通过引入节点间距函数来控制区域内网格尺寸变化。
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オhe paper discusses the essential problems that Bezier and Bspline curves are applied to 2D structure boundary presentation.It provides some useful ideas for selecting proper curve description in different cases by analysing and comparing of algorithm and feature of Bezier and Bspline curves. As an engineering example, it also gives the structure boundary desceription of the ceramic piston crown of a diesel engine.

对Bezier曲线和B样条曲线用于二维结构边界表述基本问题进行了探讨.通过对Bezier曲线和B样条曲线的生成算法与特点进行分析与比较,为不同应用场合选用合适曲线进行描述提供了依据,并给出了内燃机活塞的结构边界描述的应用实例.

A new kind of simple octree-encoding spatial decomposition algorithm based on atetrahedron root has been developed for the fully automatic generation of 3D finite-element meshes. Thisoffers a solution tO mesh generation which is one of the difficult problem in 3D electric magneticfiled computation. This paper starts from elaborating the basic algorithm of octree, and thenchooses the boundary representation method to construct the geometry.The basic process of tetrahedraloctree spatial decomposition for using...

A new kind of simple octree-encoding spatial decomposition algorithm based on atetrahedron root has been developed for the fully automatic generation of 3D finite-element meshes. Thisoffers a solution tO mesh generation which is one of the difficult problem in 3D electric magneticfiled computation. This paper starts from elaborating the basic algorithm of octree, and thenchooses the boundary representation method to construct the geometry.The basic process of tetrahedraloctree spatial decomposition for using directly in finite element analysis is described. Finally the resultof a model decomposition is given.

给出了一种新型的、比较简单的基于正则四面体的八叉树空间分解法,来生成三维有限元计算中四面体网络单元,为三维电磁场计算中的难点问题之一──网格的全自动生成提供一条思路.首先阐述了传统八叉树的基本思想,根据八又树分解空间法的基本特点选择边界表述法进行前处理中的实体建模.然后在此基础上详细论述了正四面体八叉树法划分空间、直接生成四面体网络单元的基本过程.最后给出了简单实体的剖分结果作为示范.

In this paper,the definition of mesh control information are given with the topological elements in the B\|reps of the planar domains, node space function is used to control the changes of element size. Integrating the merits of method of advancing front and the Delaunay triangulation algorithm, the longest segment of generation front is preferably dealed with, decreasing Delaunay triangulars are generated step by step and constructing a smooth graded trangular mesh.

利用任意平面域边界表述中的拓扑要素定义网格的控制信息,通过引入节点间距函数来控制区域内网格尺寸变化。并将结合前沿生成法和Delaunay三角化方法的优点,优先处理前沿上的最长边,尽可能在局部生成边长逐渐减小的Delaunay三角形,最终实现区域内网格的疏密过渡。

 
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