Hydrodynamic Aspects Of Ship Collisions With
Tension Leg Platforms
Author(s)
S. Syngellakis & C. A. Brebbia
Abstract
Collisions of tension leg platforms with ships are numerically simulated and their
consequences predicted. A non-linear mathematical model is formulated; it
accounts for two-dimensional kinematics of the colliding bodies, the local forcedeformation
characteristics within the impact zone of both structures as well as
the restoring forces induced by the pre-tensioned legs. Particular emphasis is
given to the rigorous modelling of the hydrodynamic interaction between the
floating vessels and the fluid in their vicinity. This is achieved through unit
impulse response functions that provide the damping forces as convolution
integrals involving the histories of fluid motion and inertia terms with constant
coefficients giving rise to added masses. The derived integro-differential
equations are numerically solved in the time domain. Various collision scenarios
are analysed and results are obtained for collision and hydrodynamic forces as
well as the extent of local damage. The hydrodynamic effect is linked to the
duration of impact. Thus, the problem is addressed in a more rational and
mathematically rigorous manner than that of the classical impact theory.
Keywords: tension leg platform, collision, hydrodynamic interaction, time
domain integration.
Keywords
tension leg platform, collision, hydrodynamic interaction, time
domain integration.
Related Book
Other papers in this volume
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