Flexcom > Data Inputs > $MODEL

Purpose

To is used to specify the initial position and undisplaced orientation of a vessel.

Theory

Refer to Vessels and Vessel Motions for further information on this feature.

Note also that the old *VESSEL and *RAO keywords have effectively been superseded by the new *VESSEL,INTEGRATED keyword, which accepts RAO data also, thereby eliminating the need for a separate *RAO keyword – hence the ‘integrated’ nature of the new keyword. Refer to *VESSEL,INTEGRATED for further information.

Keyword Format

An optional line to specify the formulation to be used to combine vessel rotations and to calculate the displacements of attached nodes from combined rotations. This is followed by a block of two lines defining a vessel, which is repeated as many times as necessary.

[ANGLES=Angle Theory Type]

VESSEL=Vessel Name

INITIAL POSITION=X Co-ordinate, Y Co-ordinate, Z Co-ordinate [, Initial Yaw]

Angle Theory Type can be LARGE (the default) or SMALL.

Table Input

Vessel Motions – Angles Type

Input:	Description
Angles Type:	The options are Large Angles (the default) and Small Angles.

Vessel – Initial Position

Input:	Description
Vessel:	The name of the attached vessel.
X:	The coordinate in the global X-direction of the initial position of the vessel reference point.
Y:	The coordinate in the global Y-direction of the initial position of the vessel reference point.
Z:	The coordinate in the global Z-direction of the initial position of the vessel reference point.
Theta:	The vessel initial undisplaced orientation, specified in degrees anticlockwise from the global Y-Direction. This defaults to a value of 0°.