新朔铁路既有线路条件开行2万吨重载列车试验研究  

Experimental Research on Operating 20,000-Tonne Heavy-Haul Trains under the Existing Line Conditions of Xinshuo Railway

作　　者：张小强 ZHANG Xiaoqiang(CHN Energy Xinshuo Railway Co.,Ltd.,Hohhot 010000,China)

机构地区：[1]国能新朔铁路有限责任公司,内蒙古呼和浩特010000

出　　处：《机械》2024年第12期43-50,共8页Machinery

摘　　要：开行两万吨长编组组合列车是重载铁路提升货运量的有效方法。为研究新朔铁路既有线路条件开行2万吨重载列车的可行性,选取典型线路区段开展了现场试验,试验区段主要包含直线和曲线部分。通过在轨道处安装传感器测量钢轨和轨枕的振动加速度、钢轨位移和轮轨力等数据,最终评估列车通过该区段时的安全性。试验结果表明,试验列车各项指标均处于安全限值之内,该既有线路条件满足2万吨重载列车安全行车要求。其中,列车运行通过试验区段时,钢轨和轨枕垂向加速度分别为48.98g和9.19g;钢轨垂向位移和横向位移最大分别为0.46 mm和0.63 mm;轮轨垂向力和横向力最大分别为178.14 kN和47.08 kN;机车和货车的脱轨系数最大分别为0.37和0.35,轮重减载率最大值为0.25。Operating 20,000-tonne heavy-haul trains is an effective method for increasing freight volume and an inevitable trend for development.To study the feasibility of operating a 20,000-tonne heavy-haul train on the existing line conditions of the Xinshuo heavy-haul railway,field tests are conducted on typical line sections,including straight lines and curves.Finally,by installing sensors at the track to measure the vibration acceleration of the steel rails and sleepers,steel rail displacement,and wheel-rail interaction forces,the safety evaluation of the train passing through test sections is performed.The test results show that all indicators of the test are within the safety limits,confirming that the existing line conditions of the Xinshuo Railway meet the requirements for the safe operation of 20,000-tonne heavy-haul trains.When the train passes through the test section,the vertical accelerations of the steel rails and sleepers are 48.98g and 9.19g,the maximum vertical and lateral displacements of the steel rails are 0.46 mm and 0.63 mm,the maximum values of the wheel-rail vertical and lateral forces are 178.14 kN and 47.08 kN,the maximum derailment coefficients of locomotives and freight cars are 0.37 and 0.35,and the maximum wheel load reduction rate is 0.25.

关 键 词：重载铁路 2万吨重载列车 列车运行安全 脱轨系数 轮重减载率 

分 类 号：U213.2[交通运输工程—道路与铁道工程]