COMPARATIVE DYNAMIC ANALYSIS OF THE PORTAL CRANES OF TYPE “H” AND “X”

In this paper a comparative dynamic analysis portal cranes of type “H” and “X” is described. The difference of the considered cranes arises from the difference of their portals. These two types of portals have the same main geometric measurements. They differ only at the medium level in the horizontal plane. The first type of portal on the middle level has “H”-frame, while the second type has “X”-frame. The paper compares the dynamic parameters of two portals. Estimation has been done for which of the two types of portals is considered to have a more favourable dynamic stability for overturn.