Hydrodynamic Coupling Coefficients

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Hydrodynamic Coupling Coefficients

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Theory

The layout of the added mass coupling terms is shown below and this can be repeated as often as necessary to define the coupling over a sufficiently large range of frequencies:

FREQ= Frequency

where:

Frequency is the frequency value in Hz, to which the coefficients relate

A11 is the surge coupling between the floating bodies at the relevant frequency

A22 is the sway coupling between the floating bodies at the relevant frequency

A33 is the heave coupling between the floating bodies at the relevant frequency

A44 is the roll coupling between the floating bodies at the relevant frequency

A55 is the pitch coupling between the floating bodies at the relevant frequency

A66 is the yaw coupling between the floating bodies at the relevant frequency

and the remaining terms represent the added mass coupling terms between various degrees of freedom at the relevant frequency. The first subscript denotes that the coupling influence is of the first floating body on the second, and vice versa for the second subscript.

The layout of the radiation damping terms is shown below and this can be repeated as often as necessary to define the coupling over a sufficiently large range of frequencies:

FREQ= Frequency

where:

Frequency is the frequency value in Hz, to which the coefficients relate

C11 is the surge coupling between the floating bodies at the relevant frequency

C22 is the sway coupling between the floating bodies at the relevant frequency

C33 is the heave coupling between the floating bodies at the relevant frequency

C44 is the roll coupling between the floating bodies at the relevant frequency

C55 is the pitch coupling between the floating bodies at the relevant frequency

C66 is the yaw coupling between the floating bodies at the relevant frequency

and the remaining terms represent the added mass coupling terms between various degrees of freedom at the relevant frequency. The first subscript denotes that the coupling influence is of the first floating body on the second, and vice versa for the second subscript.

Relevant Keywords

*HYDRODYNAMIC COUPLING is used to define hydrodynamic coupling between adjacent floating bodies.