为快速而有效地探测半刚性基层沥青路面结构层不连续病害,使用有限元结构与声耦合算法,探讨了半刚性基层沥青路面在受激励震动时的声效特征。计算了激励能量、路面模量、结构不连续尺寸等参数的影响,建立了半刚性基层沥青路面结构层不连续区域的声效特征值与路面结构不连续病害尺寸间的对应关系。为应用声效法探测半刚性基层沥青路面结构层连续性提供了理论依据。 In order to detect the discontinuity of semi-rigid base asphalt pavement structure rapidly and effectively, the acoustic characteristics of semi-rigid base asphalt pavement subjected to excitation and vibration were studied by finite element method and acoustic coupling algorithm. The influences of excitation energy, pavement modulus and discontinuous dimension of structure were calculated, and the corresponding relationship between the acoustic eigenvalue and the size of discontinuities of pavement structure was established based on the discontinuity of semi-rigid base asphalt pavement structure layer. It provides a theoretical basis for the application of acoustic method to detect the structural continuity of semi-rigid base asphalt pavement.