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The function of this preprocessing system is generating finite element mesh from NURBS surface and 2D object produced by geometrical modelling system.

其主要功能是对几何造型系统的NURBS曲面以及二维任意形体有限元网格划分。

In this paper, the design and study of the polar coordinates processing system for straight generatrix surface with WEDM are presented.

本文介绍了电火花线切割加工空间复杂直纹曲面的极坐标加工系统的设计与应用研究。

At the end of this paper, the later studies on the WEDM technology and the WEDM for straight generatrix surface technologies are suggested.

论文最后对空间复杂直纹曲面的电火花线切割加工技术的后续研究提出了设想和展望。

The processing system could solve the problem, which in the processing of WEDM for straight generatrix surface, and this method gets a wild application in the mould manufacture.

此系统可以解决某些复杂空间直纹曲面的加工问题,在模具及异形零件制造中可望得到良好应用。

Geodesic curvature of the pitch curve on spherical surface was introduced as a medium,through which the pitch curve on spherical surface can be changed into equivalent planar pitch curve by numerical computation method.

曲面上曲线的短程曲率为媒介,导出了球面节曲线伸展成平面当量节曲线的算法。

Then 3D surface can be flattened to 2D plane from the center line by geodesic curvature method, and an accurate 2D pattern can be created through carrying out the numerical simulation.

然后以仿测地线曲率法,从摊平基准线将3D 曲面摊平展开至2D 平面上。并进一步透过数值迭代运算得到精确的2D 裁片外形。

After analyzing the curvature of the forming surface and the relativ emotion between the forming surface and the curved tooth surface during envelope tooth cutting,the authors work out the equations for calculating the induced normal curvature and geodesic deflection,the principal curvature and direction of the tooth surface of this kind of circular-arc gear .

通过对产形面曲率和包络切齿时产形面与齿曲面相对运动关系的分析,推导出双向圆弧齿轮齿面的诱导法曲率、诱导短程挠率和齿面的主曲率、主方向等计算公式。

On the basis of the Updated Geometrical Method and Secondary Geodesic Line Method, the technique to find Geodesic Line between any two points in the curved surface is suggested.

在修正几何法和二次测地线法的基础上,解决了空间有限曲面上两点间无法做出测地线的问题。

It is useful for the direct and inverse solution of geodesic problem and applying in digital elevation model and 3D GIS model. geodesic coordinate system ; direction angle ; geodesic line ; differential relationship

本文则进一步探讨测地坐标的一些微分性质和微分关系式。1 基于测地坐标的大地线的二阶微分方程按照曲面的内蕴几何学,由

Geodesic surface on demand problem, in fact,...

曲面上的测地线的问题,实际上。。。

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