为进一步研究隧道壁面气动压力特征变化规律，基于RNG k-ε两方程湍流模型与滑移网格技术，数值模拟了高速列车经过双线隧道的全过程；然后，利用现场实测数据对数值方法准确性进行验证；最后，分析了车隧阻塞比对隧道壁面气动压力特征的影响规律。结果表明：随着车隧阻塞比的增大，初始压力波梯度最大值以及正峰值均以指数形式增大，相关系数R2均大于0.998；在列车车尾驶出隧道出口前以及驶出隧道出口后的两个不同阶段，隧道壁面典型气动压力峰值（正峰值、负峰值以及峰峰值）与车隧阻塞比之间满足以e为底的指数函数关系，相关系数R2均大于0.9995；当列车车尾驶出隧道出口后，随着时间的推移，不同车隧阻塞比下隧道壁面气动压力正负峰值差异性逐渐减小。以距隧道入口500m测点为例，当车隧阻塞比从0.0801增大到0.1122（1.4倍）时，初始压力波梯度最大值增加量为2.92，正峰值增加量为0.30kPa；列车车尾驶出隧道出口前，气动压力正负峰值增加量分别为0.35与0.60kPa；列车车尾驶出隧道出口后，气动压力正负峰值增加量分别为0.53与0.46kPa。

To further study the characteristics of aerodynamic pressure acting on the tunnel wall，the entire process of a high-speed train passing through the double-track tunnel was simulated based on the RNG k-ε two-equation turbulence model and the sliding mesh technique.Then，the accuracy of numerical method was verified by comparing the results between numerical simulation and field measurement.Finally，the influences of the train-to-tunnel area ratio on the characteristics of aerodynamic pressure acting on the tunnel wall were analyzed in detail.The results show that：the maximum gradient and positive peak values of the initial pressure wave both increase exponentially with the increase of train-to-tunnel area ratio，and the correlation coefficient R2 is greater than 0.998；at two stages of before or after the train tail leaving the tunnel exit，the relationship between the typical peak values of aerodynamic pressure（positive peak，negative peak，and peak-to-peak）acting on the tunnel wall and the train-to-tunnel area ratio is the exponential function with the ε as the base，and the correlation coefficient R2 is greater than 0.9995.After the train tail leaving the tunnel exit，the difference between the positive and negative peak values of the aerodynamic pressure acting on the tunnel wall at different train-to-tunnel area ratio decreases with time.Taking the measurement point there 500m away from the tunnel entrance as an example，when the train-to-tunnel area ratio increases from 0.0801 to 0.1122（1.4 times），the increments of the maximum gradient and positive peak values of the initial pressure wave are 2.92 and 0.30kPa，respectively；the increments of the positive and negative peak values of the aerodynamic pressure before train tail leaving the tunnel exit are 0.35 and 0.60kPa，respectively；the increments of the positive and negative peak values of the aerodynamic pressure after train tail leaving the tunnel exit are 0.53 and 0.46kPa，respectively.