Experimental investigation on squeal noise in tramway sharp curves

The aim of the present article is to bring comprehensive experimental data useful for better understanding the mechanism of squeal noise in tramway sharp curves. Simultaneous measurements of rail vibration, wheel vibration and radiated noise were performed during the transit of a tramcar. The presented results refer to two different test configurations: the instrumented wheel was positioned at first on the inner side of the curve and then on the outer one, so that the influence of wheel-rail contact on the excitation of the wheel vibration can be investigated. During the tests, the influence of the wheel-rail friction coefficient was investigated too.

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