Horizontal Forces on the Crane Runway during the Motion of the Crane

During the motion of an overhead travelling crane on the crane runway, horizontal forces between the crane and the crane runway girder occur. Some possibilities were presented in a paper by the author in 2018 and 2019. In the last one, a dynamic model was presented. This dynamic model enables us to determine the behaviour of the crane during its motion and also to calculate the horizontal transverse forces between the overhead double bridge crane wheels and the crane runway girder. This dynamic model consists of rigid parts connected by springs representing the elasticity of the steel structure of the overhead double bridge crane. The dynamic model can be used not only for the calculation of horizontal forces but also for the determination of the crane motion in general. The motion of the crane can be investigated both during its accelerating and during its motion with constant velocity. The basic assumption of this model is that there is no contact between the rim of the crane wheel and the rail of the crane runway. This paper shows the simulation of the motion of a specific overhead double bridge crane which is stationary and starts to move due to the engine's torque. The data of the crane are shown in the paper as well as the result of the simulation. The initial conditions of the crane for the purpose of the simulation are described in the paper. The simulation assumes no contact between the rim of the crane wheel and the rail of the crane runway which is consistent with the model's assumptions.