System Dynamics of Railcars with Radial- and Lateralelastic Wheels
Abstract
This paper presents vibration studies and stability analyses of a railway passenger coach. The wheelset excitations are analyzed to determine which orders of polygonalization generate droning noise in ICE passenger coaches. The strength of conventional wheelsets against vibrations due to polygonalized wheels is investigated. Radialelastic wheels reduce the unsprung mass and isolate the bogie frame and carbody from the medium and high frequency excitation caused by the wheel/rail interaction. A parameter optimization of such wheels leads to considerably reduced carbody vibrations. Stability tests, especially for the so-called hunting motion, are performed for various parameter sets of radial- and lateralelastic wheels. The results show that wheels with increased bending stiffness and improved parameters are feasible, and guarantee the stability of the wheelset motion as well as a noise reduction.
Keywords
Multibody System Critical Speed Flexible Body Flexible Multibody System Bogie FramePreview
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