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*QTF Calibration FB

Purpose

To specify calibration coefficients used to scale the QTF coefficients for a floating body.

Theory

Refer to Wave Drift Loads, QTF Coefficients and QTF Calibration Coefficients for further information on this feature.

Keyword Format

Data may defined explicitly within the keyword file itself, or defined separately in an external file which is simply referenced using a FILE= entry. The latter approach is highly recommended as it reduces unnecessary clutter in the keyword file, and also helps to improve user interface performance and enhanced user experience.

A block of data consisting of floating body name followed by a single line defining the name of an external file which contains QTF calibration coefficients.

FLOATING BODY=Floating Body Name

FILE=File Name

File Name should include the entire path of the file including its extension. If a file name or any part of its path contains spaces then it should be enclosed in double quotation marks.

A block of data consisting of floating body name followed by a single line repeated as often as necessary to define the QTF calibration coefficients over a sufficiently large range of headings. The block may be repeated for different floating bodies.

FLOATING BODY=Floating Body Name

Floating Body/QTF Heading, Surge QTF Calibration Value, Sway 

QTF Calibration Value, Yaw QTF Calibration Value

 

Table Input

QTF Calibration Coefficients (External File)

QTF Calibration Coefficients

Notes

(a)All QTF calibration coefficients default to 1.0 if unspecified.

(b)If QTF calibration coefficients are specified for a particular floating body at a particular heading, then QTF coefficients must also be defined for that same floating body at that same heading in the Characteristics – QTF Coefficients table.

(c)The headings for the QTF calibration coefficients need not necessarily be specified in any particular order (ascending order is not necessary).