Abstract Developing an accurate and efficient forward model of the dynamic response of pavement structure is of great significance for obtaining the design parameters of the layered pavement structure through an inverse calculation based on the measured pavement data. However, the existing algorithms rarely consider the interlayer contact. Based on the traditional spectral element method (SEM), this study proposes a new forward model to simulate the falling weight deflectometer (FWD) dynamic tests for the transversely isotropic layered pavement structure. The interfaces between the pavement layers can be imperfect, and the displacement boundary conditions are discontinuous. Moreover, the developed model considerably enhances the efficiency of the model in solving the dynamic response of transversely isotropic layered media by avoiding the infinite integration in integral transformation. Numerical examples verify the accuracy and efficiency of the model developed in this study. At the same time, an extensive parameter analysis is conducted on the interlayer contact of the pavement structure and inhomogeneity of the layered soil, which provides a reliable, numerical, theoretical basis for the design of pavement structure.

中文翻译：

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具有缺陷界面的柔性横向各向同性路面 FWD 试验的动力学模拟

摘要 建立准确高效的路面结构动力响应正演模型，对于基于实测路面数据进行反演求得分层路面结构设计参数具有重要意义。然而，现有算法很少考虑层间接触。本研究在传统谱元法（SEM）的基础上，提出了一种新的正演模型来模拟横向各向同性层状路面结构的落锤挠度仪（FWD）动态试验。路面层之间的界面可能不完美，位移边界条件是不连续的。而且，所开发的模型通过避免积分变换中的无限积分，大大提高了模型求解横向各向同性层状介质动力响应的效率。数值例子验证了本研究中开发的模型的准确性和效率。同时，对路面结构的层间接触和层状土的不均匀性进行了广泛的参数分析，为路面结构的设计提供了可靠的数值理论依据。