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将浮置板轨道结构视为一个隔振黑匣子,定义质量比、刚度比、阻尼比例系数三个无量纲系数以反映该隔振系统的物理特性,以欧拉梁模型模拟钢轨,以刚体模型模拟短型浮置板,推导该系统的运动方程;用傅氏变换的方法将其从时间-空间域转换到频率-波数域,改变三个比例系数,研究系统传递特性(弥散方程及传递率)的变化,从而深入探讨短型浮置板轨道结构形式的变化对系统隔振效果的影响。
The floating slab track structure is regarded as a vibration isolation black box. The three dimensionless coefficients of mass ratio, stiffness ratio and damping ratio coefficient are defined to reflect the physical characteristics of the vibration isolation system. The Euler beam model is used to simulate the rail. Simulation of the short floating plate, deriving the equation of motion of the system; using Fourier transform method from the time-space domain to the frequency-wavenumber domain, changing the three proportional coefficients to study the system transfer characteristics (dispersion equation and transmissibility ), So as to deeply discuss the influence of the change of the structure form of the short floating plate on the vibration isolation effect of the system.