Calculation of Mooring Tension of the Ship-Based Helicopter Based on FEM

The forces of the ship-based helicopter are analyzed comprehensively in the winds and waves. The parameterized FEM model about the ship-based helicopter body, the mooring cable and the mooring base is established with the language APDL. The parameterized FEM model is used to calculate the tension of the mooring cables for different sea conditions. The mooring cable will present strong nonlinearity under the action of external force. So the cable structure is disposed by the finite element method. The warp of parking position and change of sea conditions are taken into account for calculation. After defining the constraint conditions and applying external loads, the mooring tension is obtained. Compared with the theoretical and actual value, the result of the mooring tension is verified reliable. The new calculation method is supplied to improve the force state of the mooring facility.