对由于不平顺路面引起的车辆附加动荷载在饱和多孔地基中的动应力开展了解析理论研究。通过承受移动矩形垂直荷载的三维饱和多孔地基的基本解，采用矩阵递推法得到多层饱和半空间解，数值积分得到数值结果。将该方法运用于具有不平顺路面的饱和多孔半空间的情况，得到了附加动荷载在饱和多孔地基中所产生的动应力。计算结果分析了分层地基半空间计算模型的优点，还发现土体的软硬程度对地基动应力极为重要。附加动荷载的速度频率同步效应在地基中作用明显，尤其对于所产生的剪应力，在具有较硬较厚路面的情况下，附加动荷载所产生的剪应力的最大值已经超过自重恒载所产生的剪应力。不平顺波长对动应力也有很大影响，尤其是短波不平顺。在高速移动的四轮车辆荷载的情况下，不平顺的路面会造成地基的剧烈振动，不平顺波长越短（即路面越不平整），振动的越剧烈。

This work aimed to gain an insight into the influence of the dynamic component of vehicle load (caused by pavement roughness) on the dynamic stress responses in poroelastic subsoil. By introducing an analytical solution to the three-dimensional dynamic stress in the saturated poroelastic half space subjected to a harmonic rectangular moving load, the solutions of multi-layered saturated poroelastic half space under moving loading were derived using the propagator matrix method. Numerical results were obtained by performing inverse Fourier transforms. In the case of rough road on the saturated poroelastic half space computed by this method, the numerical results were obtained and used to analyze the influence of the dynamic component of vehicle load (caused by pavement roughness) on the dynamic stress responses. The results show the advantages of multi-layered poroelastic half space computing model and the stiffness of soil is important to dynamic stress responses. The speed and frequency effect of this load affect dynamic stress in subsoil dramatically. In the cause of the subsoil with thick and stiff pavement, the maximum value of shear stress caused by dynamic component is larger than those caused by vehicle weight. And the wavelength of rough pavement have an important effect on the dynamic stress responses, specially for short wavelength pavement roughness. In a model of a fast moving car with four wheels, remarkable vibration is happened caused by pavement roughness and the foundation vibrates more dramatically as the wavelength is shorter.