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JP2005234787A Visualization technique using cg 有权
标题翻译：使用CG的可视化技术
公开(公告)号：JP2005234787A
公开(公告)日：2005-09-02
申请号：JP2004041602
申请日：2004-02-18
申请人： Yoshiaki Goto , Nippon Sharyo Seizo Kaisha Ltd , 芳顯後藤 , 日本車輌製造株式会社
发明人： GOTO YOSHIAKI , OKUMURA TORU , OBATA MAKOTO , O KEIUN
IPC分类号： G06F17/50 , G06T17/20
摘要： PROBLEM TO BE SOLVED: To provide a visualization technique using a CG for preventing the occurrence of an unnatural deformed state even when multiplied by an enlargement magnification.
SOLUTION: The visualization method using a CG is provided to express the three-dimensional shape of an object by using input/output data in finite element analysis. The outline on the element cross-section of the object is calculated by connecting each of the vertexes of the cross-section by using line segments based on cross-section constancy assumption being the basic assumption of a beam theory, and the outline of the axial direction is calculated by using a three-dimensional Bezier curve using position vectors and tangent vectors at the both ends of the axial direction. The position vectors of the respective vertexes of the element both end cross-sections necessary for expressing the element deformed shape with the three-dimensional Bezier curve and the tangent vectors of the axial outline at those vertex positions are calculated from displacement and the angle of rotation at the node positions of the element both end cross-sections already known as the output data of normal analytic software, and the position vectors are calculated from the node displacement and the angle of rotation based on the the cross-section constancy assumption of the beam, and the tangent vectors are calculated by interpolating the element deformed shape from the displacement and the angle of rotation at both end nodes and torsion.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了提供使用CG的可视化技术，即使在乘以放大倍率时也防止出现非自然变形状态。解决方案：提供使用CG的可视化方法，通过在有限元分析中使用输入/输出数据来表达对象的三维形状。通过使用基于横截面恒定性假设的线段来连接横截面的每个顶点来计算对象的元素横截面的轮廓，该假设是梁理论的基本假设，以及轴向轮廓通过使用在轴向两端的位置矢量和切线向量的三维贝塞尔曲线来计算方向。根据位移和旋转角度计算元件的各个顶点的位置矢量，其中使用三维贝塞尔曲线表示元件变形形状所需的两个截面横截面和在那些顶点位置处的轴向轮廓的切线矢量在元件的节点位置，两端截面已经被称为正常分析软件的输出数据，并且基于梁的横截面恒定性假设从节点位移和旋转角度计算位置向量，并且通过从位移和两端节点处的旋转角内插元件变形形状和扭转来计算切线向量。版权所有（C）2005，JPO＆NCIPI

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