Structural Optimisation of Helideck Structure Using FEM

Abstract

Offshore structures and vessels have the helideck platforms for facilitating helicopter landing as well as take-off phases. The weight reduction for a specific well-known design without altering its main dimensions offers best possible alternative for the sake of economy. Reducing the structural weight of helideck is the best way possible alternative for the sake of economy. Optimising the structural weight is of paramount importance in marine applications. Hence, it becomes necessary to focus on the response of the structure using finite element analysis. From the FEA results the structure can be optimized so as to reduce the weight of the structure. The structure is analysed for normal and emergency landing of helicopter at and for two materials, Steel AH36 and Aluminium alloy of grade 5083-H116. Also, the structure is analysed for different scantling of secondary stiffener. The results are documented and compared so as to obtain an optimised design for the structure.