摘要
针对车身曲面难以用单张曲面进行表达的情况,提出用光滑拼接多张带形状参数的双三次Q-Bézier曲面技术构造曲面方法,并用多张双三次Q-Bézier曲面拼接描述汽车车身曲面;提出由设计师构建多个单张双三次Q-Bézier曲面,再进行曲面间的光滑拼接,在编辑各组双三次Q-Bézier曲面公共边界的位置及其各形状参数的情况下,得到大量的车身造型方案。该方法基于双三次Q-Bézier曲面的生成及其拼接原理,可以高效调整车身曲面及其公共边界,获得光滑的曲面连接效果,从而快速获得多种汽车车身造型方案。所提方法运算速度快、易于操作,具有良好的可拓展性。
In engineering,the complex car body surfaces cannot be described by using one single surface; thus the continuity conditions of the cubic Q-Bézier surfaces with multiple shape parameters were investigated. A car body design method based on cubic Q-Bézier surfaces with multiple shape parameters is proposed in this paper,which describes the car body that has a group of cubic Q-Bézier surfaces with multiple shape parameters in the design process. The group of cubic Q-Bézier surfaces are created and blended continuously; the surfaces＇ boundary position and shape parameters were modified efficiently,thus obtaining the new car body design solutions. This design method,based on the principle of cubic Q-Bézier surfaces that generates and blends multiple shape parameters,can quickly edit the surfaces by adjusting the boundary curve and obtain many design solutions,being widely applied to modern industrial design.
出处
《机械科学与技术》
CSCD
北大核心
2017年第1期114-118,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(51305344
61502088)
广东省高等院校质量工程重点项目(SZYZH201301)
中山市科技计划项目(2014A2FC338
2015B2356)资助
