基于CATIA的CRH380AL动车组头车三维曲面设计  

3D surface design of CRH380AL EMU first carriage based on CATIA

作　　者：武振锋[1] 陈周锋[1] 

机构地区：[1]兰州交通大学机电工程学院,甘肃兰州730070

出　　处：《武汉大学学报（工学版）》2013年第5期635-639,共5页Engineering Journal of Wuhan University

基　　金：国家自然科学基金项目(编号:11172119);甘肃省高等学校科研项目(编号:2013B-022);兰州交通大学青年科学基金资助项目(编号:2011018)

摘　　要：针对CRH380AL型动车组头车的结构特点,将其划分为驾驶室和车厢两部分.在驾驶室曲面设计中,提出了一种采用NURBS理论的设计方法.该方法首先应用CATIA软件创建了曲面的主型线,然后在主型线的基础上适当增加中间控制线,同时应用曲线曲率梳工具,完成了中间控制线的优化,最后将中间控制线所围成的网状结构进行了曲面填充.为提高整车的空气动力学性能,采用多截面曲率梳和反射线方法对头车驾驶室进行了光顺性评价,评价结果均表明被测区域达到了曲面光顺的要求.研究结果不仅可以作为后续列车流场分析的基础,同时也可以为驾驶室骨架安装以及蒙皮加工制造提供可靠的理论依据.In view of the structural features of the first carriage of CRH380AL electric multiple-unit （EMU） ,it can be separated into the driver cab and the coach. A method based on NURBS theory is pro- posed for the design of the driver cab. This method firstly creates the main line of surface based on CATIA software and then adds the middle control line to the main one,meanwhile optimizes the middle control line by adopting the curvature comb tool. Finally, this methed fills the reticular formation which formed by the middle control line. In order to improve the aerodynamic performance of the EMU,the method inclu- ding multi-section curvature comb and reflection lines are applied to evaluating the 3D surface model of driver cab. The evaluation results show that the measured region satisfies the surface smoothing require- ments. The results not only can be used as the basis of subsequent train flow field analysis, but also can provide reliable theoretical evidence for cab frame installation and outer surface manufacturing.

关 键 词：CRH380AL 动车组 曲面模型 光顺评价 CATIA 

分 类 号：U266.2[机械工程—车辆工程]