The dynamic analysis has been successfully used to predict the pavement response based on the finite element modeling, during which the stiffness and mass matrices have been established well, whereas the method to determine the damping matrix based on Rayleigh damping is still under development. This article presents a novel method to determine the two parameters of the Rayleigh damping for dynamic modeling in pavement engineering. Based on the idealized shear beam model, a more reasonable method to calculate natural frequencies of different layers is proposed, by which the global damping matrix of the road pavement can be assembled. The least squares method is simplified and used to calculate the frequency-independent damping. The best-fit Rayleigh damping is obtained by only determining the natural frequencies of the two modal. Finite element model and in-situ field test subjected by the same falling weight deflectometer pulse loads are performed to validate the accuracy of this method. Good agreements are noted between simulation and field in-situ results demonstrating that this method can provide a more accurate approach for future finite element modeling and back-calculation.

基于有限元建模的动态分析已经成功地用于预测路面响应，在此期间已经很好地建立了刚度和质量矩阵，而基于瑞利阻尼的确定阻尼矩阵的方法仍在开发中。本文提出了一种确定用于路面工程动态建模的瑞利阻尼的两个参数的新方法。基于理想化剪切梁模型，提出了一种更合理的计算不同层间固有频率的方法，通过该方法可以组装道路路面的整体阻尼矩阵。最小二乘法被简化并用于计算与频率无关的阻尼。最佳拟合瑞利阻尼是通过仅确定两个模态的固有频率来获得的。通过有限元模型和相同落锤式挠度计脉冲载荷下的原位现场试验验证了该方法的准确性。模拟和现场现场结果之间的良好一致性表明这种方法可以为未来的有限元建模和反算提供更准确的方法。