摘要
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.
A dynamic model for the continuous floating slabs is presented in this paper on the basis of an analysis of floating slab track system. In the model, the floating slabs are regarded as the Bernoulli - Euler beams supported by elastomer bearings. By exploring the effect of the layout of floating slabs on the train - bridge coupled vibration characteristics, a reasonable layout configuration of floating slabs on the floating slab track system is obtained. The length of continuous floating slabs should be twice as much as that of box beam when ballastless tracks are designed initially.
出处
《郑州大学学报（工学版）》
CAS
2008年第3期113-116,共4页
Journal of Zhengzhou University（Engineering Science）
基金
国家自然科学基金项目资助(50508040)
关键词
浮置板
车桥系统
耦合振动
高架桥
floating slab
vehicle - bridge system
coupled vibration
viaduct
