Hull and Outfitting

VARIATION

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VARIATION

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Last UpdatedJan 05, 2024
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Purpose

To carry out either 1-CP or LACKENBY shifts to a current SAC.

Syntax

VARIATION ( /CP ) ( /CB=$N ) < /AFT >
< /FORWARD >
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( /LACKENBY ) ( /CB=$N ) < /LCB=$N > < /PBA=$N > < /PBF=$N >
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( /LCB=$N) < /CB=$N > < /PBA=$N > < /PBF=$N >
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( /PBA=$N) < /CB=$N > < /LCB=$N > < /PBF=$N >
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( /PBF=$N) < /CB=$N > < /LCB=$N > < /PBA=$N >

Description

The command VARIATION /CP or /LACKENBY carries out shifts of section positions according to the ONE MINUS PRISMATIC or LACKENBY methods.

VARIATION /CP

When using the 1-CP method the user is required to specify a new Block Coefficient (CB) value to which the shifts must be calculated. The user has the option to accommodate all the CB change in the AFT or FORWARD body by specifying the appropriate modifier.

Examples

VARIATION /CP /CB= 0.6
VAR /CP /CB=0.6 /AFT

VARIATION/LACKENBY

In the LACKENBY method the user has the option to modify one or more of the following parameters:

Block Coefficient (CB)
Longitudinal Centre of Buoyancy (LCB)
Aft position of parallel midbody (PBA)
Forward position of parallel midbody (PBF)

For any value not specified by the user the system assumes the original value by default.

Examples

VAR /LACKENBY /CB=0.6
VAR /LAC /CB=0.5 /LCB=80.5 /PBA=3 /PBF=5

Hull and Outfitting

VARIATION

Table of Contents

VARIATION

Purpose

Syntax

Description

VARIATION /CP

Examples

VARIATION/LACKENBY

Examples

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