论文信息 - MODELING INDIRECT STATISTICS OF SURFACE ROUGHNESS

MODELING INDIRECT STATISTICS OF SURFACE ROUGHNESS

Quarter-car model-based indirect statistics of road surface roughness are analyzed in this paper. The stochastic process theory is used to establish the relationship between the international roughness index (IRI) statistic of a quarter-car response and the power spectral density (PSD) of road random excitation. Under the circumstance of a linear vehicle model and homogeneous roughness with a zero-mean Gaussian distribution, we prove that the average of the absolute response of the quarter-car model is directly proportional to the standard deviation of that response quantity. This result enables us to further correlate the indirect statistics with PSD roughness. A theoretical relation between the IRI and the PSD roughness is established. Based on the road classification proposed by the International Standards Organization (ISO), it is found that a linear correlation exists between the IRI and the standard deviation of roughness. Furthermore, corresponding to the ISO PSD-based road classification, an IRI-based road classification is provided to categorize pavement into five classes, ranging from very good surface condition to very poor surface condition.

[1] C. J. Dodds. The Laboratory Simulation of Vehicle Service Stress , 1974 .

[2] Mark B. Snyder,et al. Predicting Vertical Acceleration in Vehicles Through Road Roughness , 1992 .

[3] M Sayers,et al. Development, Implementation, and Application of the Reference Quarter-Car Simulation , 1985 .

[4] P F Sweatman,et al. A STUDY OF DYNAMIC WHEEL FORCES IN AXLE GROUP SUSPENSIONS OF HEAVY VEHICLES , 1983 .

[5] J P Zaniewski,et al. Root-Mean-Square Vertical Acceleration as a Summary Roughness Statistic , 1985 .

[6] P E Irick,et al. The Pavement Serviceability-Performance Concept , 1960 .

[7] Gilbert Swift,et al. A COMPARISON OF FOUR ROUGHNESS MEASURING SYSTEMS , 1969 .

[8] J. D. Robson,et al. The description of road surface roughness , 1973 .

[9] Carl L Monismith,et al. Modern Pavement Design Technology Including Dynamic Load Conditions , 1988 .

[10] J. D. Robson. ROAD SURFACE DESCRIPTION AND VEHICLE RESPONSE , 1979 .

[11] Malcolm Good,et al. HEAVY VEHICLE DESIGN PARAMETERS AND DYNAMIC PAVEMENT LOADING , 1985 .

[12] Lu Sun,et al. PREDICTING VERTICAL DYNAMIC LOADS CAUSED BY VEHICLE-PAVEMENT INTERACTION , 1998 .

[13] John P Zaniewski,et al. Modern Pavement Management , 1994 .

[14] H. Saunders,et al. An Introduction to Random Vibration and Spectral Analysis (2nd Ed.) , 1986 .

[15] J. H. F. Woodrooffe,et al. The Influence of Suspension Variations on Dynamic Wheel Loads of Heavy Vehicles , 1986 .