低速磁浮交通轨道结构强度计算与分析

Strength Calculation and Analysis on Track Structure for Low-speed Maglev Transit

结合株洲机车厂低速磁浮试验线工程,建立了包含F形导轨、H形轨枕、混凝土轨道梁及其联接件的磁浮线路上部结构有限元模型,计算了列车悬浮静荷载、悬浮动荷载以及列车滑撬和滑轮支承荷载作用下轨道结构的应力与变形,并依据相关标准和规范对轨道结构设计进行校核。结果表明:低速磁浮轨道的导轨、轨枕、M16和M30螺栓均满足其强度设计要求;为了提高F形导轨与轨枕的联接强度,降低F形导轨两磁极反应面的垂向位移差,可适当加大导轨与轨枕连接螺栓的直径。

In combination with the low-speed maglev test-line project on the CSR Zhuzhou Electric Locomotive Co.,LTD.,a finite element model of track superstructures including the F-shaped lead rail,the H-shaped sleeper,the concrete girder and all the fastenings is developed.Then stress responses and deformations of the track structure are calculated under the train static levitation loads,dynamic levitation loads,skid loads and supporting pulley loads.Furthermore,the track structure strength is checked according to relevant design guidelines and standards.Analysis results show that the rail,the sleeper,the M16 and M30 bolts meet the strength design requirements.In order to enhance the joint strength between the lead rail and the sleeper,and decreasing the vertical displacement difference between both magnetic pole response surfaces of F-shaped rail,the nominal diameter of bolt linking the rail and sleeper should be increased properly.