Evaluation Method of the Vibration Reduction Effect Considering the Real Load- and Frequency-Dependent Stiffness of Slab-Track Mats

The purpose of this research was to investigate and improve the accuracy existing slab-track mat (STM) specifications in evaluation vibration reduction effect. static nonlinearity dynamic mechanical characteristics three types STMs were tested, then a modified fractional derivative Poynting–Thomson (FDPT) model used characterize preload frequency dependence. A vehicle–floating slab track (FST) coupled established analyze actual insertion loss. loss error evaluated by frequency-dependent tangent stiffness increased with increase STM nonlinearity, obtained third usually greater than that second preload. Compared secant stiffness, more suitable for evaluating high-static–low-dynamics (HSLD) stiffness. In order reflect dependence effect facilitate engineering applications, it is recommended corresponding natural FST be evaluation. Furthermore, monotonically decreased as axle load increased, opposite true isolation efficiency HSLD both stable better monotonic