Parametric Modeling And Analysis On The Pedigree Of EMU Bogie Frame

In2008,with the using of the EMU in Beijing-Tianjin line,which is the first high speed railway passenger dedicated line.The railway industry of our country has entered the era of high speed rail. At present,there are CRH1,CRH2,CRH3and CRH5are running on the railway in Chinese EMU of CRH series.Meanwhile,the CRH6EMU has came off the assembly line. In order to achieve rapid customization for diverse needs of high-speed trains, the state proposed to build an integrated platform for the high-speed trains design and manufacture. The EMU bogie frame is a key part of bearing and passing a variety of force. Its structure has formed a series. This thesis built on the framework of parametric modeling system that can effectively shorten the product design and development cycles and improve product design quality. It has important engineering significance and academic value.Base on the analysis on the structure characteristic of the existing EMU bogie frames.This thesis divided the frame into two modules,the side beam and the cross beam by using the idea of modularization design. And extracted and described their structure control parameters.Used Visual Basic6.0to carry on CATIA secondary development, combined with the solid modeling technology and the parameter-driven method to achieve the parametric modeling of frame.At the same time,based on the database accessing technology and the interactive interface development technology of VB. Established simply operated style and clearly process of interactive window for the parametric modeling system. This article built the parametric modeling system that would be constrained type package assembly within the program. It only need to enter the assembly size manually,then the parts can be automatically assembled.Parametric modeling is generally used in optimization technology. Therefore, make ues of the parametric modeling of CAD system for creating CRH6bogie frame body.Then attached varieties of hanging brackets to get the whole structure model of the frame. Determine the loading conditions in accordance with UIC615-4and EN13749standard, do optimization design of the frame size at the end of the thesis.Then feedback parameters that after optimization to parametric modeling system for recreating model.