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轮轨系统车轮的高频振动特性

, PP. 44-49

Keywords: 轮轨系统,车轮,有限元模型,高频振动,轨道不平顺,接触滤波

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Abstract:

建立了车辆-轨道-路基耦合系统振动分析模型,考虑轨道不平顺激励及轮轨接触区滤波,模拟了轮轨间随机振动垂向作用力。建立了车轮三维实体有限元模型,考虑了名义接触点、轮缘和车轮外侧3个轮轨接触位置,模拟了车轮系统在随机振动垂向荷载作用下的高频振动特性。分析结果表明当列车以200km.h-1行驶在有砟轨道上时,轮缘的振动加速度响应最大,达到870m.s-2,辐板次之,可达493m.s-2,轮毂振动响应最小,为457m.s-2。在名义接触点进行激励时,辐板振动响应最大,可达563m.s-2,在轮缘接触点对车轮进行激励时,辐板振动响应为492m.s-2,在车轮外侧进行激励时,辐板振动响应最小,为301m.s-2。车轮各部位的主要振动峰值都集中在1000~3000Hz范围内,其中振动最大加速度集中在1400Hz左右,在更高的频域范围中,由于波数过滤器作用很强,振动响应并不突出。

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