轨道科研试验线的轮轨力、脱轨系数及减载率研究

为了对同济大学轨道交通科研试验线进行脱轨安全性评定,采用测力钢轨法测试轨道交通科研试验线列车通过时的轮轨力,包括轮轨垂直力及横向力,由轮轨力计算脱轨系数及轮重减载率。结果表明,列车以速度20、30及40 km/h驶过时,南侧钢轨的轮轨垂直力平均值在54.91~56.14 k N范围内,北侧钢轨的轮轨垂直力平均值在72.91~76.62 k N范围内;南侧钢轨的轮轨横向力平均值在5.77~7.86 k N范围内,北侧钢轨的轮轨横向力平均值在6.48~7.11 k N范围内;脱轨系数分别为0.096、0.104及0.113,轮重减载率分别为0.141、0.152及0.154,脱轨系数及轮重减载率都远小于限界值,都具有很大的安全余量,轨道交通科研试验线在脱轨安全性评定方面完全符合要求。

Research on wheel-rail force derailment coefficient and wheel load reduction ratio of the scientific research track line

The train running on the track test line without derailment is the basic premise of track engineering scientific research test. In order to carry out the assessment of the derailment safety of the rail transportation comprehensive test line of Tongji University,this article measures the wheel-rail force of the rail transportation comprehensive test line,including wheel rail lateral force and vertical force,and then calculates the derailment coefficient and wheel load reduction rate through the wheel rail force. Results show,when the train passes at the speed of 20,30and 40 km/h,the average value of the wheel rail vertical force of the south rail is in the range of 54.91~56.14 kN,those of the north rail is in the range of 72.91~76.62 kN;t of the south rail is in the range of 5.77~7.86 kN,those of the north rail is in the range of 6.48~7.11 kN;The derailment coefficient are 0.096,0.104 and 0.113,wheel load reduction rate are 0.141,0.152 and 0.154. The derailment coefficient and wheel load reduction rate is less than the limit value,and has great safety margin,the scientific research test rail transportation line meets the requirements completely in the derailment safety evaluation.