STRENGTH EVALUATION OF SWING MOTION BOGIE BY FINITE ELEMENT ANALYSIS

초록

This paper proposes an application of Swing Motion Bogie on Korean railroad with freight car speed of 120km/h. Swing Motion Bogie was developed to allow high-speed operation while maintaining the quality of running performance(riding quality). Even though Swing Motion Bogie is based on the classical secondary suspension, Swing Motion Bogie reduces freight damage as well as strength of shocks transferred to the rails. With Swing Motion Bogie, freight trains can be equal with passenger train in speed. To evaluate the structural strength of Swing Motion Bogie, structural analysis was performed through finite element analysis. The modeling of entire bogie was done with shell and solid element. S/W used in analysis are DISPLAYⅢ which is a pre/post processor, and NISAⅡ for finite element analysis. Swing Motion Bogie is composed of side frames, a transom and a bolster. We assume that gap does not exist between bolster and side Frame. Since the test was to examine the structure, spring effect between bolster and transom is ignored. To display the actual shape, solid element was used for side frame and shell element was used for bolster and transom.