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首页> 外文期刊>International Journal of Production Research >Point-based approach to enhance the quality of geometric data for CAE applications
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Point-based approach to enhance the quality of geometric data for CAE applications

机译：基于点的方法可提高CAE应用程序的几何数据质量

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摘要

Commercial CAD surface modelling software is based almost exclusively on Bezier, B-spline and NURBS representations. These methods offer simple interactive shape modification and computationally efficient interrogations, but have some serious practical limitations. The root cause of all these problems is that the parametric polynomial methods are not geometry-based, and the trouble is compounded by the master geometry philosophy which treats the CAD model as if it were absolutely correct. An alternative purely geometric approach to surface modelling has been established, where the surface shape is characterised by a grid of points lying on the surface, but it is recognised that this approach would require major changes in existing CAE systems. This application paper explains the rationale to develop algorithms, which would plug into existing CAE software systems, so that the user could benefit from the point-based construction without disturbing the established mode of operation. The new point-based approach has achieved significant success in ensuring that form tools produce panels within a specified tolerance.
机译：商业CAD曲面建模软件几乎完全基于Bezier，B样条曲线和NURBS表示。这些方法提供了简单的交互式形状修改和计算有效的查询，但是有一些严重的实际限制。所有这些问题的根本原因是参数多项式方法不是基于几何的，并且麻烦的是由主几何学原理加重了，该原理将CAD模型视为绝对正确。已经建立了一种替代的纯几何方法进行表面建模，该方法的表面形状以位于表面的点网格为特征，但是已经认识到，这种方法将需要对现有的CAE系统进行重大更改。本应用文件解释了开发算法的原理，该算法将插入现有的CAE软件系统中，以便用户可以从基于点的构造中受益，而不会干扰已建立的操作模式。新的基于点的方法在确保成型工具生产指定公差内的面板方面取得了巨大成功。

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  • 来源
    《International Journal of Production Research》 |2010年第8期|2003-2010|共8页
  • 作者

    A.A. Ball; R.J. Cripps; J. Lin; M. Loftus;

  • 作者单位

    School of Mechanical Engineering, University of Birmingham, Birmingham, B15 2TT, UK;

    School of Mechanical Engineering, University of Birmingham, Birmingham, B15 2TT, UK;

    Department of Mechanical Engineering, Imperial College, London, SW7 2AZ;

    School of Mechanical Engineering, University of Birmingham, Birmingham, B15 2TT, UK;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    point-based surfaces; forming tool design;

    机译：基于点的曲面;成型工具设计;

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