DETC2009/MSNDC-86605 A LINEAR STABILITY ANALYSIS FOR CURVE SQUEALING OF TRAINS

Curve squealing of railway wheels occurs in narrow curves with a frequency of about 4 kHz and is caused by a self-excited stick-slip oscillation in the wheel-rail contact. A squeal model, consisting of the first modal forms of an elastic wheel and a three-dimensional hard Coulomb contact, is developed to analyze the stability of the stationary run through a curve via linearization about the steady sliding equilibrium. The results show that in particular the front inner of the four wheels of a certain bogie tends to squeal