The report describes the measurement of dynamic tire forces exerted by a large truck on an instrumented section of pavement. Particular attention is given to an analysis of the problems involved in obtaining pressure records and the development of data processing procedures to convert these records to force records. As the truck traversed a region near a test point in the pavement, the tire pressures in its inner and outer left dual tires were recorded with time. Two procedures are used to convert pressure records to force records from an F/P (frequency response transform) vs. frequency calibration. Predicted and experimental force power spectra are calculated from pavement elevation power spectra and from measured tire forces respectively. Conclusions are (1) that for small displacements the vehicle suspension system during the calibration tests may be approximated as a linear system, (2) the distribution of force between inner and outer dual tires is strongly influenced by the transverse road profile, (3) the dynamic component of the total tire force (dynamic plus static) of one wheel of the truck was as great as the total force of one wheel of an automobile, and (4) predicted force power spectra were generally higher than experimental values. (Author)
Measurement of the Dynamic Tire Forces of a Large Truck
1965
169 pages
Report
Keine Angabe
Englisch