PDF《流线型列车头部设计制造一体化方法》

第7卷第1期2007 年2月交通运输工程学报Journal of T raffic and Transportation Engineering Vol.

7 No.

1 Feb.

2007 收稿日期 : 2006-

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11 基金项目 : 铁道部科技研究开发计划项目(2003J001 - H) 作者简介 : 许平(1971 - ), 男 ,湖南长沙人 , 中南大学讲师 , 工学博士研究生 , 从事车辆结构动力学研究 . 导师简介 : 田红旗(1959 - ), 女 ,河南鲁山人 , 中南大学教授 . 文章编号 : 1671- 1637(2007)01 -

0006 -

06 流线型列车头部设计制造一体化方法 许平,田红旗 ,姚曙光 (中南大学 轨道交通安全教育部重点实验室, 湖南 长沙 410075) 摘要: 为了确保流线型列车头部结构与外形一致, 分析了流线型头部外形与结构特点 ,在Auto- CAD 的ARX 、Ⅰ - deas 的Open Ⅰ - deas 平台上 ,提出了流线型列车头部外形与结构设计制造一体化 方法 .它包含三个模块: 一是应用非均匀有理 B 样条(NU RBS)曲线曲面造型原理进行外形设计;

二是应用 N URBS 曲面的求交理论和三维几何造型技术进行结构设计;

三是采用 N URBS 曲线的 线段拟合理论编制结构平面曲梁数控加工模块.实验表明该方法能按照人们的意志自由、快速地 设计复杂的流线型列车头部外形, 自动生成以平面曲梁构成的网格状头部结构 ,并针对不同的数控 切割设备, 生成相应的平面板梁数控加工文件 ;

将过去传统的由设计、工艺 、 加工等多部门协作耗时 的工作,集中由计算机自动完成,实现了列车头部设计制造一体化的重大变革. 关键词: 车辆工程;

流线型列车 ;

N URBS 曲线曲面 ;

曲梁 ;

数控加工 中图分类号 : U270 .

2 文献标识码 : A Integrative method of design and manufacture on streamlined head of train Xu Ping , Tian Hong- qi , Yao Shu- guang (Key Laboratory for Traffic Safety on T rack of Ministry of Education , Central South University , Changsha 410075, Hunan, China) Abstract: In order to insure that the streamlined shape of train head is consistent with its structure, the characters of the shape and structure were analyzed , and a design and manufacture integrative method of the shape and structure w as developed on the A RX of A utoCAD and the Open I- deas of I- deas softw are flat roof. The method includes three modules. T he first is shape design module based on non uniform rational B spline(NU RBS) theory , the second is structure design module based on the intersection theory betw een tw o N URBS surfaces and 3- D geometric modeling technique , the third is NC machining module of bend sheet- beams of head structure based on line approximation form of N URBS and programming technique. Applied result show s that the complex streamlined shape of train head can be promptly and freely designed according to human'

s will , the head grid structure made up of bend sheet- beams can be created automatically , and the relevant NC machining files of bend sheet- beams are made aimed at the different NC machining tools ;

the time- cost w orks , formerly cooperated among the departments of design , technique and machine, are fully finished by computer, an important revolution is realized in the design and manufacture of train head.

9 figs ,

10 refs. Key words: vehicle engineering ;

streamlined strain ;

N URBS curve and surface ;

bend sheet- beam ;

NC machining Author resumes: Xu Ping(

1971 - ), male, lecturer, doctoral student , +86- 731-

2655294 , csxuping @ 126. com;

Tian Hong- qi(1959 - ), female, professor, +86- 731- 2655390, thq @ mail. csu.edu. cn.