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Added Mass Coefficients

Theory

The layout of the added mass terms is shown below and this can be repeated as often as necessary to define the added mass 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 added mass at the relevant frequency

•A22 is the sway added mass at the relevant frequency

•A33 is the heave added mass at the relevant frequency

•A44 is the roll added mass at the relevant frequency

•A55 is the pitch added mass at the relevant frequency

•A66 is the yaw added mass at the relevant frequency

and the remaining terms represent the added mass terms between various degrees of freedom at the relevant frequency.

Relevant Keywords

•*ADDED MASS is used to define added mass for a floating body.

If you would like to see an example of how this keyword is used in practice, refer to E02 - CALM Buoy - Complex.