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列车时速变化对雨棚动力响应的影响研究
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Abstract:
为探究列车通过铁路站房时在雨棚结构上引起的动力响应，本文将模态综合法引入站房雨棚结构的车致动力响应分析中，并基于实测结果对其进行验证。在此基础上，重点探究了列车车速变化对雨棚的车致动力响应的影响。结果表明：根据提出的理论分析方法计算所得的站房结构动力响应峰值与实测值的误差在15%以内；雨棚各部位的冲击系数在车速为210 km/h和280 km/h时会出现两次峰值，且当车速为280 km/h左右时，冲击系数达到最大值；雨棚边缘相比于雨棚中部受车速的影响更加显著，且雨棚各跨端部冲击系数更大。
In order to investigate the dynamic response caused by the train passing through the railway station building on canopy structure, this paper introduces the modal synthesis method into the analysis of the vehicle-induced dynamic response of the station building canopy structure, and verifies it based on the measured results. On this basis, the influence of the change of train speed on the dynamic response of the canopy car is studied. The results show that the error between the peak value of the dynamic response calculated by the theoretical analysis method and the measured value is less than 15%. The impact coefficient of each part of the canopy will peak twice when the speed is 210 km/h and 280 km/h, and the impact coefficient reaches the maximum value when the speed is about 280 km/h. The impact of vehicle speed on the canopy edge is more significant than that in the middle of the canopy, and the impact coefficient of each span end of the canopy is greater.
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