高速铁路平纵断面关键点处的轮轨振动特性

The Wheel-Rail Vibrations on the Key Points of Planar and Vertical Section in High-Speed Railways

运用多体系统动力学软件SIMPACK,建立了高速车辆在线路平纵断面上运行的动力学分析模型,分别分析了车辆高速通过缓和曲线起(止)点、竖曲线起(止)点等线路平纵断面关键点处的轮轨振动特性。分析结果表明:当受到无轨道随机不平顺激扰时,缓和曲线越短,竖曲线半径越小,关键点处的轮轨冲击振动越剧烈。

By using software SIMPACK, the dynamics model of high-speed vehicle passing through the planar and vertical section is established. When the vehicle rushes through the key points of pla- nar and vertical section, the wheel-rail vibration caused by those points is analyzed. Results indicate that when the random irregularity is not applied on the track, the shorter transition curve or smaller vertical curve radius both lead to the more powerful wheel-rail vibration on the key points.