| dc.description.abstract | The local analysis and structural design of the floating pylon for the Bjørnefjorden TLP Supported Suspension Bridge was performed. Ship collision analysis were conducted for the bow of a container vessel in order to design a pylon that is highly resistant against ship collision.
A preliminary design of the structural arrangement, the geometry and the mechanical properties of the pylon were proposed considering the general configuration. Later a finite element model considering the initial design was built in Patran software and refined in LS-DYNA software to simulate ship collision.
Collision simulations were conducted by using LS-DYNA in order to investigate the structural response of the pylon. The damage for both the vessel and the pylon were identified for different collision directions. The failure mechanism was investigated in relation to the force-deformation relation.
The structural performance of the pylon was studied in terms of the number of damaged compartments, the damage level, stress and strain levels, internal energy, pressures and the force-deformation curves.
The dynamic response of the bridge was investigated by carrying out time domain simulations using USFOS software considering accidental loads due to ship collision. To do so, the updated force-deformation curves from LS-DYNA were implemented for computations in USFOS. Collision simulations were conducted by using non linear springs to simulate the collision effect.
Residual strength analysis for the bridge were conducted considering flooded compartments. Moreover the dynamic response was studied in terms of the maximum displacements. Finally the failure in the form of fracture of one tether is included in order to study the variation of forces in critical components | |
