Fig. 1. Construction of a bolsterless bogie and parts name.
Fig. 2. Rigid body mode of a traction motor at around 57 Hz (note that it is different from the bogie in Fig. 1).[1]
Fig. 3. Vibration velocity on a traction motor bracket and a saloon floor when mechanical resonance is occurred.; upper figure is on the traction motor bracket, lower figure is on the saloon floor.
Fig. 4. Finite element model of a bogie to perform modal frequency response analysis and positions of excitation and receiver (it is a model coming from the bogie in Fig. 1).
Fig. 5. Traction motor rigid body mode (51.4 Hz).
Table 1. The results of FRF analysis of a bogie. Excitation and receiver positions are referred to Fig. 4.
References
- J. Kim, S. Song, and H. Lim, "Rigid-body mode of traction motor on a motorized bogie and its influence on the saloon of rolling stocks" (in Korean), Proc. Kr. Soc. Urban Railway, September, 137 (2017).
- S. C. Sunnersjo, "Rolling bearing vibration - the effects of geometrical imperfections and wear," J. Sound. Vib. 98, 455-474 (1985). https://doi.org/10.1016/0022-460X(85)90256-1
- N. Pagaldipti and X. Qu, "Modal frequency response optimization in Optistruct," Proc. 7th World Congress on Computational Machanics (2006).
- L. Meirovitch, Fundamentals of Vibration, International Ed. (McGraw-Hill, New York, 2001) pp. 336-345.