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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.
According to the structural characteristics of the first car of CRH380AL EMU, it is divided into two parts: the cab and the cabin.In the cab surface design, a design method based on NURBS is proposed.The method firstly uses CATIA software to create the surface Main line, and then the main line based on the appropriate increase in the middle of the control line, while the use of curve curvature comb tools to complete the middle control line optimization, and finally the middle of the control line surrounded by the mesh structure of the surface filled. In order to improve the aerodynamic performance of the whole vehicle, the curvature of the cab of the head car was evaluated by the method of multi-section curvature comb and reflection line.The results of the evaluation showed that the measured region meets the requirement of smooth surface.The results of the study can not only be used as Follow-up train flow field analysis of the foundation, but also for the installation of the cab skeleton and skin manufacturing provide a reliable theoretical basis.