Perpustakaan Digital ITB

In this thesis, one numerical strategy is conducted as an alternative approach to other existing methods in simulating the Fluid Structure Interaction (FSI) of an amphibious aircraft pontoon section subjected to hydrodynamic loading. As one of principal components of amphibious aircraft, the analysis of aircraft pontoon withstanding an impact load during landing is carried out. Landing phase has been considered as critical condition as the structures were being dependable to handle the supporting role for the whole aircraft. Within ABAQUS environment, FSI simulation is performed by utilising the Coupled Eulerian-Lagrangian (CEL) in maintaining the solid body being undisturbed by the fluids, instead it flows around the body. With the development of computational mechanics, such methods known as Multiscale Modelling is introduced to reduce computational time and resource while still maintaining its accuracy. As the Multistage Multiscale Modelling has been carried out, here, the Concurrent Multiscale Modelling is performed as an alternative strategy to model the pontoon section undergoes hydrodynamic loading. Beforehand, static convergence tests were conducted to ensure the reliability of elements size being used during the simulation. Moreover, from the FSI simulation, the Concurrent Multiscale Model turned out to be outperformed the global solid model, while having a comparable performance with the Multistage Multiscale Modelling, in terms of stress distribution and usage of computational resource, compared to the global shell model as the reference.