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在对具有浮置板结构的无碴轨道的分析基础上,针对预制式浮置板结构的特点,建立了连续整体型浮置板结构的力学模型,即弹性支撑的Bernoulli-Euler梁模型.通过连续型浮置板结构不同的纵向布置对轨道梁系统振动响应影响的分析,认为当连续型浮置板的长度为箱梁跨度的2倍时,钢轨的位移、加速度,以及箱梁的动扰度、加速度值均相对较小;在对浮置板式无碴轨道进行初始设计时,建议连续型浮置板的长度可取为箱梁跨度的2倍.
Based on the analysis of ballastless track with floating slab structure, the mechanical model of continuous integral floating slab structure is established according to the characteristics of prefabricated floating slab structure, that is, the elastic supported Bernoulli-Euler beam model. The analysis of the influence of different vertical arrangement of continuous floating plate on the vibration response of the track beam system shows that when the length of the continuous floating plate is 2 times the span of the box girder, the displacement and acceleration of the rail and the movement of the box beam Degree and acceleration are relatively small. In the initial design of floating slab ballastless track, it is suggested that the length of continuous floating slab should be 2 times of span of box girder.