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列车进出站的振动及噪声问题不容忽视,然而目前关于列车变速移动问题的研究相对较少。为了研究进出站列车对周围环境的振动影响,在轨道结构频域周期性解析模型基础上,求解了单个及系列移动质量、移动质量系统变速移动下轨道结构的动力响应。通过求解变速移动质量下简支梁的动力响应,与已有算例进行对比,验证了计算模型的正确性。研究结果表明:移动质量作用下轨道动力响应远大于移动力作用下的动力响应;由于移动质量和轨道结构间的相互作用,轨道的动力响应中包含了较多的振荡成分;随着移动加速度的增大,轨道动力响应略有增大。
The problem of vibration and noise of train entering and leaving stations can not be neglected. However, there are relatively few studies on the problem of speed and movement of trains. In order to study the influence of the train entering and exiting the train on the surrounding environment, the dynamic response of the track structure with single and series moving mass and moving mass system under variable speed movement was solved based on the periodic analysis model of the frequency structure of the track structure. By solving the dynamic response of a simply supported beam with variable speed moving mass, compared with the existing example, the correctness of the calculation model is verified. The results show that the dynamic response of the orbit under moving mass is far greater than that under the moving force. Due to the interaction between the moving mass and the orbital structure, the orbit’s dynamic response contains more oscillatory components. With the acceleration of movement Increase, orbit dynamic response slightly increased.