铁道标准设计
鐵道標準設計
철도표준설계
RAILWAY STANDARD DESIGN
2014年
8期
44-47
,共4页
整体道床轨道%橡胶减振垫轨道%振动%减振效果
整體道床軌道%橡膠減振墊軌道%振動%減振效果
정체도상궤도%상효감진점궤도%진동%감진효과
track with monolithic track bed%track with rubber vibration-damping pad%vibration%vibration damping effect
为了得到地下线路采用橡胶减振垫轨道的减振效果，建立车辆轨道隧道土层建筑物的三维有限元无限元耦合模型，分别计算采用普通整体道床轨道和橡胶减振垫轨道2种工况下沿线建筑物的三向振动加速度振级。结果表明：列车运行引起的建筑物振动，以垂直于线路方向的横向振动为主，其次为垂向振动，平行于线路方向的纵向振动最小；采用橡胶减振垫轨道后，楼柱节点的横向、纵向加速度振级明显减小，且随着距地面高度的增高，降幅基本一致，约为8.9 dB；采用普通整体道床轨道和橡胶减振垫轨道时，楼板垂向振动规律基本一致，即随着楼层的增加，楼板垂向振动呈现先减后增的趋势，但是差别甚小。与普通整体道床轨道相比，橡胶减振垫轨道可以降低楼板垂向加速度振级约9 dB。
為瞭得到地下線路採用橡膠減振墊軌道的減振效果，建立車輛軌道隧道土層建築物的三維有限元無限元耦閤模型，分彆計算採用普通整體道床軌道和橡膠減振墊軌道2種工況下沿線建築物的三嚮振動加速度振級。結果錶明：列車運行引起的建築物振動，以垂直于線路方嚮的橫嚮振動為主，其次為垂嚮振動，平行于線路方嚮的縱嚮振動最小；採用橡膠減振墊軌道後，樓柱節點的橫嚮、縱嚮加速度振級明顯減小，且隨著距地麵高度的增高，降幅基本一緻，約為8.9 dB；採用普通整體道床軌道和橡膠減振墊軌道時，樓闆垂嚮振動規律基本一緻，即隨著樓層的增加，樓闆垂嚮振動呈現先減後增的趨勢，但是差彆甚小。與普通整體道床軌道相比，橡膠減振墊軌道可以降低樓闆垂嚮加速度振級約9 dB。
위료득도지하선로채용상효감진점궤도적감진효과，건립차량궤도수도토층건축물적삼유유한원무한원우합모형，분별계산채용보통정체도상궤도화상효감진점궤도2충공황하연선건축물적삼향진동가속도진급。결과표명：열차운행인기적건축물진동，이수직우선로방향적횡향진동위주，기차위수향진동，평행우선로방향적종향진동최소；채용상효감진점궤도후，루주절점적횡향、종향가속도진급명현감소，차수착거지면고도적증고，강폭기본일치，약위8.9 dB；채용보통정체도상궤도화상효감진점궤도시，루판수향진동규률기본일치，즉수착루층적증가，루판수향진동정현선감후증적추세，단시차별심소。여보통정체도상궤도상비，상효감진점궤도가이강저루판수향가속도진급약9 dB。
In order to ascertain the vibration damping effect of underground railway track with rubber vibration-damping pad, a three-dimensional finite element and infinite element coupling model of vehicle-track-tunnel-soil-building system was established, and the vibration levels of the three-direction vibration accelerations of the building along the underground railway were calculated respectively under the two working conditions:the track which came with ordinary monolithic track bed and the track which came with rubber vibration-damping pad. The results show that: ( a ) Among the building vibrations caused by train running, the transverse vibration perpendicular to the track direction is the dominant one, followed by the vertical vibration, while the longitudinal vibration parallel to the track direction is the smallest. ( b ) When using the track with rubber vibration-damping pad, the vibration levels of the transverse and longitudinal accelerations of the column nodes of the building will considerably decrease;and the decreasing will be almost the same with the increasing of the height to the ground surface and will be about 8. 9dB. (c)The building floor slabs' vertical vibration patterns which are obtained respectively by using the track with ordinary monolithic track bed and by using the track with rubber vibration-damping pad, are basically the same;namely, the building floor slab's vertical vibrations will present a trend of decreasing at first and then increasing as the building storey increases, but the difference will be very small. ( d ) Compared with the track which comes with ordinary monolithic track bed, the tack which comes with rubber-damping pad can decrease the vibration level of vertical acceleration of the floor slab by about 9 dB.
