基于虚拟样机技术的铁路货车轴端电机结构设计

The Structural Design of Shaft-end Generator in Railway Wagons Based on Virtual Prototype Technology

介绍了虚拟样机技术和Pro/E软件,描述了铁路货车轴端电机的结构和功能特点及其虚拟样机模型的三维设计流程。讲述了模块化理念和并行设计方法在轴端电机总体设计中的应用,并详细描述了参数化设计方法在轴端电机详细设计中的应用,主要包括零部件尺寸参数化、装配约束参数化及Pro/E提供的"外部复制几何"和"使用参照"两种参数化工具。以永磁体厚度作参数化变量为例,介绍了多学科分析在轴端电机结构设计中的作用。通过铁路货车轴端电机结构设计的实践表明:先进的三维设计技术和卓越的多学科分析方法是基于虚拟样机技术的产品结构设计的重要工具和组成部分,能有效缩短设计周期、减少设计成本,并能保证产品满足使用者的需求。

The technology of Virtual Prototype （VP） and the software of Pro/Engineer （Pro/E） are introduced. The characteristics of structure and function of shaft-end generator in railway wagons are described, as well as Three Dimensional （3D） design process of its VP Model. The applications of the idea of modularity and the method of concurrent design in the general design of shaft-end generator are presented, and the application of the method of parametric design in its detail design is described in detail, mainly including component dimension parameterization, assembling constrain parameterization and two parametric tools, namely external copied geometry and external preference. The function of multi-disciplinary analysis in the structural design is presented with the example of regarding the thickness of permanent magnet as parametric variable. Via the work of the structural design of shaft-end generator in railway wagons, practice shows that advanced 3D design technique and excellent multi-disciplinary analysis methods are very most important tools and parts in the product structural design based on virtual prototype technology, and also, the design cycle and cost can be reduced and the product can be guaranteed to meet the requirements of users.