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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1 000～3 000Hz范围内,其中振动最大加速度集中在1 400Hz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。
The vibration analysis model of the vehicle-track-subgrade coupling system is established, and the track irregularity excitation and wheel / rail contact zone filtering are considered to simulate the vertical force of random vibration between the wheel and rail. The three-dimensional solid finite element model of the wheel was established. The contact positions of the three wheel and rail on the nominal contact point, the wheel rim and the outer side of the wheel were considered. The high-frequency vibration characteristics of the wheel system under random vibration and vertical load were simulated. The results show that when the train travels on a ballast orbit at 200km · h -1, the vibration response of the rim is the highest, reaching 870m.s-2, followed by the spoke plate, reaching 493m.s-2, and the hub vibration The minimum response is 457m.s-2. When the nominal contact point is excited, the vibration response of the web is the largest, up to 563m.s-2. When the wheels are driven at the wheel flange contact point, the vibration response of the web is 492m.s-2. When the wheel is excited outside , The web vibration response is the smallest, 301m.s-2. The main vibration peaks in all parts of the wheel are concentrated in the range of 1 000-3 000 Hz, of which the maximum vibration acceleration is concentrated at about 1 400 Hz. In the higher frequency range, the vibration response is not prominent due to the strong effect of the wave number filter .