Assessment of the Generating Mechanisms and Characteristics of Wheel/Rail Noise via Study of a Rolling Disc,
SOUTHAMPTON UNIV (ENGLAND) INST OF SOUND AND VIBRATION RESEARCH
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Wheel-Rail noise has been the subject of much investigation over recent years and as these investigations have developed, attention has been directed towards the use of models based upon representation of practical wheels and rails. This study models the wheel as a thin disc and is concerned with the excitation and response of the disc in flexural vibration rather than in-plane vibration. Other investigators who have examined the Free Vibration characteristics have included rotary and shear deformation into the analyses but these can be neglected here. Most of the previous work on the forced vibration has been experimental, and in this study an analytical model is presented, for the forced vibration response of a rotating disc with inclusion of the effect of rolling contact. For the cause of the excitation to the disc various sources have been examined rigid body forces generated by a rolling disc and surface interaction forces due to the roughness of the rolling surface are the main causes studied.