Stability analysis ship-to-shore gantry crane due to speed of wind with finite element method

Abstract

The purpose of this research was to study the stability of the coastal port crane (Ship-to-shore gantry crane) of 50 Tons was analyzed by finite element method (FEM). The main structure of the crane is made of hot-rolled steel (SM 490). The analysis was performed under in-service crane conditions and in the case wind load range of 16 - 35 m/s total of 7 working positions were considered. With a vertical constant force of 811 287 N and the crane out-off-service with a wind load of 48 m/s of wind. The results from the finite element of both conditions showed that the maximum stress occurring in the boom end (Forestay) tension unit was 239.05 MPa. Which is less than the yield strength of the material (Yield strength) and in the linear elastic range, it is still safety from failure due to over-yield stress. The maximum reaction of the crane leg is 30 300.61 N, occurring in the right leg of the crane. And reaction force, the out-off-service state does not cause structural buoyancy. The maximum displacement is 157.02 mm occurs at the boom end, which the maximum value is within the allowable values ​​and the design conditions of the crane. It was also found that the force caused by the impact of the wind. It does not affect the imbalance of the crane and the stiffness of the components.