时速100km地铁车辆踏面制动热负荷分析

Analysis of Heat Load in Tread Braking of Metro Vehicles with the Speed of 100 km/h

建立了地铁车辆时速100 km时的车轮热负荷计算模型,叙述了计算过程和评定方法。基于均布热源法,采用ANSYS软件分别计算了仅空气制动连续2次紧急制动和仅空气制动正常运营制动2种条件下新轮(φ840 mm)和磨耗到限车轮(φ770 mm)的踏面制动热负荷,并进行了强度校核。结果表明,磨耗到限车轮连续2次紧急制动、新轮正常运营制动满足车轮踏面损伤要求,新轮连续2次紧急制动和磨耗到限车轮正常运营制动不满足车轮踏面损伤要求。

The heat load calculation model for wheels of metro vehicles with the speed of 100 km/h is set up. The calculation process and the evaluation method are described. On the basis of the uniformly distributed heat source method, with the application of the ANSYS software, the heat loads in tread braking of new wheels (φ840 mm) and wheels worn to limit (φ770 mm) under two conditions of 2 times continuous emergency braking with air braking only and normal operation with air braking only are calculated, and the strength is checked. The result shows that the 2 times continuous emergy braking of wheels worn to limit and the braking in normal operation of new wheels can meet the requirements of the wheel tread damage, however, the 2 times continuous emergy braking of new wheels and the braking in normal operation of wheels worn to the limit cannot meet the requirements of the wheel tread damage.