The article researches into the influences of vehicle parameters and the train speed on the vehicle-bridge system's vertical load-carrying natural frequency. Using ihe interactional vehicle-bridge system model, when the vehicle parameters and the train speed are respectively changed, the changed value of vertical load-carrying natural frequency in railway double-track continuous steel truss girder bridge is calculated. The results show that the bridge's vertical load-carrying natural frequency is impacted by the vehicle parameters, but it is independent of the train speed.%研究车辆参数和列车行车速度对车-桥系统竖向有载自振频率的影响情况.采用车-桥系统相互作用的计算模型,分别改变车辆参数和列车行车速度,计算铁路双线连续钢桁梁桥的竖向有载自振频率的变化情况.结果表明:车辆参数对桥梁竖向有载自振频率有一定影响,而桥梁竖向有载自振频率与行车速度无关.
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