【摘要】 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。更多还原

【Abstract】 The floating slab was considered as an opaque box used to isolate vibration induced by passing vehicles. The effectiveness of the system was studied by using receptance method. The rail and short floating slab were considered as Euler-Bernoulli beam and rigid mass respectively, and then the vibration equations were transformed to wave-frequency domain by Fourier transformation. The dispersion graphs and receptance equation were obtained,and the effectiveness of the isolation system were deeply studied through changing the parameters defined as mass、stiffness and damping ratio relating to the structure.更多还原