检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]同济大学道路与交通工程教育部重点实验室,上海201804 [2]华东交通大学土建学院,江西南昌330013
出 处:《振动工程学报》2008年第6期559-564,共6页Journal of Vibration Engineering
基 金:国家重点基础研究发展计划资助项目(2007CB416607);国家自然科学基金资助项目(50568002);江西省自然科学基金资助项目(2008GQC0056)
摘 要:为了分析不平顺条件下高速铁路轨道结构振动,推导了移动车辆在轮对处和轨道结构在轮轨接触点处的柔度矩阵,考虑移动轴荷载和轨道不平顺,建立了移动车辆-轨道垂向耦合振动的解析模型。模型中,移动车辆考虑为弹簧和阻尼器连接的多刚体系统;有碴轨道结构模拟为连续弹性3层梁;轮轨间考虑为线性赫兹接触。算例分析了单台TGV高速动车引起的有碴轨道结构振动,得到轨道不平顺引起的动态轮轨力和轨道各部分的最大振动加速度,研究了列车速度、轨道不平顺以及轨下垫板及扣件、道床和路基等轨下基础刚度对轨道振动的影响。计算表明:随着列车速度和轨道不平顺的增加,轨道结构的振动响应不断增大;轨下基础刚度对轨枕和道床的振动影响较大,对钢轨振动的影响较小。In order to analyze vibration of high-speed railway tracks with geometric irregularities, receptances of the vehicle at the wheelsets and the track at the wheel-rail contact points are derived, an analytical model for moving vehicle-track vertical coupling vibration is established by considering moving axle loads and track irregularities. In the model, moving vehicle is modeled as multiple rigid body system connected with spring and damper, ballasted track structure is simulated by the continuous elastic three layers beam, and wheel-rail contact is linear Hertzian contact. Vibration of the ballasted track structure caused by a TGV high speed locomotive is analyzed in the numerical example. Dynamic wheel-rail forces due to track irregularities and the maximal vibration acceleration of each component of track structure are produced. Influences of train speed, track irregularities, and stiffness of sub-rail foundation including rail pad and fastening, ballast, subgrade on the track structure vibration are investigated. The computations show that vibration responses of track structure enlarge with increases of train speed and track irregularities; stiffness of sub-rail foundation has a great effect on the vibration of sleeper and ballast, and has little influence on rail vibration.
关 键 词:高速铁路 轨道不平顺 轨道振动 解析研究 车辆-轨道耦合
分 类 号:U213.2[交通运输工程—道路与铁道工程]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:3.149.249.140