1980•Publication of: Australian Road Research BoardRequires access
EFFECT OF HEAVY VEHICLE SUSPENSIONS ON DYNAMIC ROAD LOADING
P Sweatman
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Abstract
Several vehicle characteristics other than static axle load affect the dynamic loads transmitted to road pavements. The dynamic performance of a range of load- sharing axle group suspensions was studied experimentally by the Australian Road Research Board as an outcome of the National Association of Australian State Road Authorities' economics of road vehicle limits study. Dynamic wheel forces were measured in nine suspensions under typical operating conditions and were found to vary widely between the suspensions. Centrally- pivoted tandem drive suspensions generated higher dynamic loading than other suspension type and were more strongly affected by the oeprating speed. The relatively minor effects of vertical spring rate variations, tyre inflation pressure and the load carried per axle are described. Forces on the road pavement are discussed and it is concluded that certain beam- type tandem drive suspensions generate the largest dynamic road loading. Load- sharing suspensions with improved dynamic performance are available (a). The ISBN of the microfiche is 0 86910 004 1. (TRRL)