This study introduces a local resonance phononic crystal vibration isolator (LRPCVI) aimed at reducing vibrations resulting from wheel–rail interactions. Drawing on the bandgap theory of phononic crystals, the bandgap characteristics of LRPCVI are studied using finite element method with a focus on the longitudinal wave gap analyzed through modal analysis. Furthermore, the shielding performance is verified by analyzing its transmission characteristics, vertical stiffness, equivalent density, etc., while the impact of isolator material properties and geometry on the bandgap are investigated. Finally, a 3D semi‐rail model is developed to systematically evaluate the overall vibration isolation performance of floating slab tracks equipped with LRPCVI. The results indicate that LRPCVI generates a local resonance bandgap with a range of 32.129–137.42 Hz, demonstrating significant potential for effectively mitigating rail vehicle vibration in floating slab track systems.
Hai et al. (Wed,) studied this question.