摘要
为准确地研究高速列车运行产生的环境振动,从列车运动平衡方程出发,结合轨道弯曲方程,推导不平顺条件下的列车动荷载简化解析表达。以推导的列车振动荷载作为输入,利用2.5维有限元法,研究不同列车运行速度下不平顺幅值和波长对地基振动的影响。分析结果表明:不平顺波长与列车运行速度一定时,不平顺幅值越大,引起的轮轨作用力和地基振动加速度越大;不平顺幅值与列车运行速度一定时,不平顺波长越长,引起的动态轮轨力及地基振动加速度越小。
In order to precisely study the environmental vibration generated by high-speed train,based on the equilibrium equation of the trains,combined with the track bending equation,a simplified analytical expression for train dynamic load is derived considering geometric irregularities. Then,the deduced train dynamic load is input to analyze the influences of wavelength and amplitude on ground vibration by 2.5D finite element method(FEM). The results show that:the wheel-rail force and ground vibration acceleration enlarge with the increasing track irregularity amplitude considering the irregularity wavelength and train speed as constant values. The wheel-rail force and ground vibration acceleration decrease with the increasing track irregularity wavelength considering the irregularity amplitude and train speed as constant values.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2013年第S2期4123-4129,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(51178342)
上海市重点学科建设资助项目(B308)
关键词
路基工程
高速铁路
轨道不平顺
列车荷载
2.5维有限元
地基振动
subgrade engineering
high-speed railway
railway geometric irregularities
train loads
2.5D finite element method(FEM)
ground vibration
