摘要
根据国内外铁路隧道整体道床的建设经验,针对弹性支承块式整体道床结构,建立轨道-道床底板-底部垫层相互作用的粘弹性地基梁模型。依据弹性梁动力分析的第一类变量广义HAMILTON拟变分原理,推导出了粘弹性地基上弹性地基梁的动力分析方程,建立了相应的有限元解析方法对整体道床结构的动力响应特征与影响因素进行分析。研究成果对优化整体道床结构的设计参数,分析其动力稳定性具有重要意义。
Based on the constructional experiences of integration ballast in tunnel at home and abroad, a model of visco-elastic foundational beam that simulates the interaction among rail, ballast and embankment was established for the elastically supported integration ballast structure. The dynamic equation was derived for the elastic foundational beam on the visco-elastic foundation, by means of the first kind variable generalized variation principle of Hamilton. A FEM analysis method was carried out to study the dynamic response characteristics and the influence factors on the ballast. The results are valuable for optimizing design parameters and analyzing dynamic stability of the ballast structure.
出处
《振动与冲击》
EI
CSCD
北大核心
2005年第4期99-102,共4页
Journal of Vibration and Shock
基金
湖南省教育科学研究基金资助项目上海市重点建设基金资助项目
关键词
整体道床
粘弹性地基梁
变分原理
动力分析
Elasticity
Finite element method
Foundations
Optimization
Railroad tunnels
Rails
Structures (built objects)
