Evaluation of vibrational eigenfrequencies and eigenmodes and loss factor for monoblock rail wheel

The aim of this research was evaluated experimentally eigenfrequencies, eigenmodes and loss factors for the monoblock rail wheel in two options: a) without acoustic damping disc, b) with acoustic damping disk. Excitation was realized by an electrodynamic vibrator with different levels of excitation and by hammer. The raill wheel was forced on a wheel set placed on a special frame. Frequency range of modal analysis was up to 6400Hz with step 0.25Hz. The measurement and analysis was performed for all identifiable eigenfrequencies with emphasis on eigenmodes having from two up seven node radials without node cirles. Pro determination of eigenfrequencies and loss factors corresponding eigenmodes the modal analysis was carried out for all options of the damping disk