Abstract
An experimental expression of the restoring force of a tire compressed by a flat plate and a dull edge is derived. Using this expression, equations of motion are obtained for a light truck running over a low bar-like projection placed normal to the direction of cruising of the truck. These equations are solved by a numerical method for the situation in which the left wheels of the truck run over the projection. Based on the solution, the force applied to the road by the truck is calculated. Experiments are made to measure the applied force. A force-measuring device equipped with a force-receiving, flat top plate is settled in the road with the top plate flush with the road surface, and a bar-like projection is attached to the top plate. The force is measured when the left wheels of the truck run over the device. It is concluded that the results of calculation show good agreement with those of experiment.
