REDUCTION OF DYNAMIC LOADS DURING BRAKING OF THE OVERHEAD CRANE MOVEMENT MECHANISM

This study investigates the movement of a bridge crane during the braking of the travel mechanism. Complex dynamic phenomena accompany this process. The presented dynamic model of the crane allows for a deeper analysis of the influence of various factors on the operation of the travel mechanism, particularly the interaction of massive moving elements and elastic links. The study develops braking modes for the travel mechanism of the bridge crane aimed at minimising dynamic loads during braking. As a result of the conducted research, analytical expressions have been obtained to reduce the dynamic loads occurring in the crane drive during its operation. These expressions are important as the implementation of such control ensures the reliability and safety of crane mechanisms, preventing emergencies related to the overloading of crane structural elements. This mode significantly reduces the risk of damage to mechanical components and increases the longevity of the crane system. The presented mathematical model considers mechanical processes as discrete systems with lumped parameters, providing an approximate reproduction of the real behaviour of massive objects moving along the rail track. This approach allows for an effective assessment of the impact of the braking mode on individual elements of the bridge crane's structure.