To obtain the road excitation, 3D walking pavement of transportation vehicles was reconstructed based on fractal characteristics in theoretically. The random samples were generated by inverse Fourier transform of international and national standard pavement spectrum, the average fractal dimension (1.59) was calculated using the Contour RMS method; 3D pavement theoretical model was established according to the average fractal dimension and the statistical characteristics of 2Dstandard pavement by the Random mid-point displacement method and the Triangulations method; every grade pavement was simulated in 3D space, vertical section of which could be regard as 2D standard simulation pavement. This method is fit for 3D reconstruction of pavement.%为获得路面激励,通过理论推导实现基于分形特征的交通运输车辆行走路面的三维重构.对国际与国家规定的标准路面谱进行逆傅里叶变换以产生随机路面样本,用轮廓均方根法获得路面平均分形维数(1.59)；结合二维路面的统计特征,根据随机中点位移法和三角剖分法,建立三维路面理论模型；对各等级路面进行三维仿真,其纵向任(一)截面可作为二维仿真路面.该建模理论适合行走路面的三维重构.
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