轴重和轨枕空吊对轨道几何检测数据的影响

利用有限元软件建立有砟轨道仿真分析模型,计算得出检测车在不同轴重下通过单根、连续2根和连续3根轨枕空吊线路时4种型号钢轨的轨道高低峰峰值,分析检测车轴重、连续空吊根数及钢轨型号对轨道高低峰峰值的影响。研究结果表明:轴重越大、连续空吊根数越多,对轨道几何检测数据的影响越大;单根轨枕空吊时,钢轨型号对轨道几何检测数据影响较小;连续空吊根数达到2根及以上时,钢轨型号对轨道几何检测数据影响较大;建议检测车轴重偏差控制在1.5 t以内。

Influence of Axle Load and Sleeper Hanging on Track Geometry Inspection Data

The simulation analysis model of ballast track was established by using the finite element software.Four types of rail track high and low peak values were calculated when the inspection vehicle passes through in the conditions of a single,two continuous and three continuous sleepers hanging and different axle loads.The influence of the axle load of inspection vehicle,the number of results continuous sleepers hanging and the type of steel rail on the high and low peak value of track was analyzed.The research shows that the larger the axle load and the number of continuous sleepers,the greater the impact on the track geometry detection data is,under the single sleeper hanging.The rail type has less influence on the track geometry detection data,when the number of unsupported continuous sleepers reaches 2 or more,the rail type has a great influence on the track geometry detection data.It is suggested to control the deviation of axle load within 1.5 t.