FE해석을 이용한 도시철도 제륜자의 스퀼 성향 분석

초록

As the wheel-shoe type railway brake has clearance between the wheel and shoe, the contact area changes with variations in pressure. In this study, the squeal propensity for wheel brakes is investigated using a complex eigenvalue analysis dependent on the contact area. An FE model was constructed, with an error of no more than 8%, by performing a modal test. As the shoe is a composite material, it generally has a very large damping value. Rayleigh damping was obtained by the modal test while the complex eigenvalue analysis was conducted with a damping effect. The results show that dynamic instability was generated by mode-coupling instability and the shoe-type railway squeal noise was 2315Hz. Furthermore, from the results of the squeal test, this squeal mode is predicted to be radial in-plane mode. Thus, the squeal propensity for the wheel-shoe type suggests that the in-plane mode of the shoe is dominant.

키워드