Research on the influence of different damping structure on the vibration and noise characteristics of wheel-railOA

Purpose-The purpose of this study is to reduce wheel-rail vibration noise(with the noise level increasing by approximately 9 dB for every doubling of train speed)by enhancing wheel damping.Besides,it verifies the performance of the damping wheel and provides support for the engineering application of low-noise wheels.Design/methodology/approach-This study takes the damping ring-constraint layer composite wheel as the research object.First,it proposes a wheel scheme combining a damping ring and constrained damping.Then,it verifies the natural frequency and damping of the proposed wheel via 3D finite element modeling and modal analysis.Finally,in the laboratory,the wheel-rail relationship test setup is used to conduct tests on two types of wheel structures(nondamping wheel and damping wheel)under radial and axial excitation.Findings-The damping wheel significantly reduces the corresponding radiated sound power level,with an overall noise reduction of approximately 10 dB or more,especially in the high-frequency region(around 3,150 Hz).The damping ring reduces high-frequency noise,while the constraint layer suppresses medium-low frequency noise.The combined structure outperforms single-component structures in the full frequency range,as it can suppress both high-frequency whistling noise and medium-low rolling noise.Originality/value-The originality of this study lies in proposing a wheel scheme that combines a damping ring and constrained damping.The study’s value is to provide a theoretical basis and technical guidance for the engineering application of low-noise wheels in rail vehicles.