HEAVILY LOADED VEHICLE TIRES ANALYSIS AND CHARACTERIZATION

ABSTRACT:

Vibration characterization and experimental modal analysis were carried out
with a heavily loaded vehicle tire. These tires are typically subjected to loads that are
over two times those experienced by a passenger car tire. The results obtained
through experimental modal analysis were compared to similar results obtained for
standard passenger car tires. The comparisons show that the heavily loaded tire has
unique dynamic characteristics. Complex damping and nonlinear behavior were
considered to explain these characteristics. A flexible ring tire model was used to
investigate these nonlinear characteristics. Complex damping was also examined to
explain the experimental observations. This thesis contains some of the first results
on vibration characterization of heavily loaded vehicle tires. The incorporation of the
results into a multi-degree-of-freedom tire model for use with the Effective Road
Profile Control scheme used for vehicle durability simulation studies was also

investigated.

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Design of a Manually Operated Paper-Recycling Machine

Abstract
A manually operated paper-recycling machine was designed and fabricated. This was done to enable waste paper conversion into useful product. The fabricated plant consists of six major component units that include the disc refiner, the hydropulper, the head box, the felt conveyor, the driers and the rollers. From the results of experimental analysis carried out on the study, it was discovered that for every 0.1kg of used paper fed into the refiner, about 7000ml of water is required to defibre it, and about 0.2 kg of starch adhesive is required. The calculated volume of the refiner, hydropulper and head box is 11795.62cm3, 62930.47cm3 and 60979.096cm3 respectively. The fabricated machine is capable of producing 7.6 kg of recycled paper from 10 kg of used papers

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