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Driving Comfort and Roadway Loading By Commercial Vehicles
Published January 01, 1980 by Verlag Des Verein Deutscher Ingenieure GmbH in Germany
Studies have shown that roadway damage occurs as a power function of axle-loading. The axle-loading consists of static and dynamic portions, the latter of which is determined by roadway irregularities, speed, and vibrational parameters of the vehicle. However, modifications of vibrational characteristics will simultaneously alter driving comfort and stress-loading of cargo.
Three-dimensional models have been established for commercial trucks. Correct representation of irregularity processes permits modeling of the auto-spectral concentrations which determine the effective value of vibrations. A 38 t tractor-trailer is used as an example and differences in modeling the degree of symmetry in roadway irregularities are presented.
Subsequent discussion and data presentation analyze the effect on acceleration of the vehicle superstructure by various parameters, including damping characteristics, tire configurations, and vehicle geometry. Results show that twin-tired models require incorporation of all four irregularity processes. Significant improvement of vibrational loadings can be realized.