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为了研究适用于高速列车侧风安全性评价的风载模型和评价指标,基于均匀风假设和空气动力学结果建立了定常稳态风载模型,基于EN 14067—6—2010标准提出的瞬态风速分布模型和准静态理论建立了瞬态中国帽风载模型,基于AR模型建立了随机风载模型。建立了具有86个自由度的某高速动车组头车详细的动力学仿真模型,并将不同风载模型作为外部激励施加到车辆上。采用数值仿真方法,研究不同的风载模型和轨道激扰对运行安全性评价指标数值的影响,从而确定适合高速列车的风载模型和安全性评价指标,给出高速列车不同运行速度下的临界安全风速。结果表明,采用瞬态中国帽风载模型且不施加轨道激扰、用侧风倾覆系数评判运行安全性,适合我国高速列车的侧风安全性评价。
In order to study the wind load model and the evaluation index which are suitable for the safety evaluation of high speed trains in crosswind, a steady steady wind load model is established based on the uniform wind assumption and the aerodynamics results. Based on the transient wind speed proposed in EN 14067-6-2010 Distribution model and quasi-static theory, a transient Chinese hat wind load model was established and a stochastic wind load model was established based on the AR model. A detailed dynamic simulation model of a high-speed EMU head car with 86 degrees of freedom was established, and different wind load models were applied to the vehicle as external stimuli. The numerical simulation method is used to study the influence of different wind load models and orbiting disturbances on the operation safety evaluation index values to determine the wind load model and safety evaluation index suitable for high-speed trains. The critical values of high-speed trains at different operating speeds are given Safe wind speed. The results show that using the transient Chinese hat wind load model without orbital disturbance and using the lateral wind overturning coefficient to evaluate the operational safety, it is suitable for the crosswind safety evaluation of Chinese high-speed trains.