FEA IMPLEMENTATION IN MOVING LOAD PROBLEM AT BRIDGE CRANES

摘要

The dynamics of an overhead crane with moving hoist with FEA is considered in this paper. The weight of hoist and payload was treated as moving force, ignoring inertia effects. The trolley has velocity which is function in time. Illustration of equivalent nodal forces is applied at uniform discretizied beam subjected to a single load moving at prescribed velocity. It is obtained frequencies and dynamic deflections of structure of bridge crane finite element model. The results show that standard finite element packages, apart from modal analysis and tyme hystory analysis, can be used to describe response of structure to time-variant moving loads.