부산대학교 도서관

In this study, we analyzed the behavior of a gantry crane (hereafter referred to as crane) that started to runaway owing to an unforeseen strong wind, operated the rail brakes, and then decelerated and stopped. In the analysis, the cranes in cases wherein the cabin is at the standby position and at the seaside limit position of traverse were targeted. When the rail brakes started to operate, the acceleration and displacement of the cabin at the seaside limit position of traverse were larger than those at the standby position. After the crane runaway ended, the cabin had a residual swing. The frequency of the residual swing of the cabin at the seaside limit position of traverse was smaller than that at the standby position. Because the displacement and acceleration of crane swing that an operator is exposed to become large when the cabin is at the seaside limit position of traverse, it is desirable to return the cabin to the standby position in a situation wherein the rail brakes may be used.