Please ensure Javascript is enabled for purposes of website accessibility
Powered by Zoomin Software. For more details please contactZoomin

Hull and Outfitting

TABLE OF CONTENTS

DEFINE MIDSHIP

Save PDF
Save selected topicSave selected topic and subtopicsSave all topics
Share
Share to emailCopy topic URL
  • Last UpdatedFeb 01, 2023
  • 2 minute read

Purpose

This command allows the user to define the various parameters required to formalise a generalised midship section.

Syntax

DEFINE ( MIDSHIP ) ( /BILGE ) ( /CIRCULAR Radius )
    ( /FLAT dy dz  )
    ( /OFF  )
  -------------------------------
  ( /FOK ) ( dy )
  ------------
  ( /ROF ) ( dz )
  ------------
  ( /SHOW )
  -------------------------------
  ( /TUMBLE ) ( /IN=  ) ( dy dz )
    (  /OUT= )
    ---------
    ( /OFF )

Description

The midship section or extent of parallel midbody that can be generated includes facilities to define the following geometrical attributes:

  • TUMBLE IN

  • TUMBLE OUT

  • FLAT BILGE

  • CIRCULAR BILGE

  • ROF

  • FOK

Once these parameters are defined the midship section or extent of parallel midbody is generated using the CREATE PMB command.

The system will automatically set up the correct point types for the various section geometries that can be generated using the midship definition.

Note that if the DEFINE MIDSHIP command is not used then the default action is to have a circular bilge with a radius as defined in the General Particulars.

Command Qualifiers

/BILGE /FLAT dy dz

This command indicates that the Midship Section is to have a flat bilge and the extent of the bilge will be denoted by the following two values:

  1. The first value is the distance from the half breadth to the intersection of the flat bilge line with the baseline.

  2. The second value is the height from the baseline to the intersection of the flat bilge line with the half breadth. If the flat bilge is at 45 degrees to the baseline, then both values will be equal.

/BILGE /CIRCULAR Radius

This command indicates that the Midship Section is to have a circular bilge with the specified radius.

/TUMBLE /IN dy dz

This allows the user to define linear TUMBLE IN by specifying the following two values:

  1. Extent of tumble in measured from the half breadth at the ship depth as set up in the general particulars.

  2. Height from baseline at which tumble in meets the half breadth.

    /TUMBLE /OUT dy dz

    This allows the user to define linear TUMBLE OUT by specifying the following two values:

    1. Extent of tumble out measured from the half breadth along the baseline.

    2. Height from baseline at which tumble out intersects the half breadth.

      /ROF dz

      This defines the extent of the Rise of Floor ( ROF) and the value given is the height from the baseline at the half breadth. This parameter may have already been defined in the General Particulars and this command enables the user to change that value.

      /FOK dy

      This defines the extent of Flat of Keel ( FOK) and the value given is the half breadth from the centreline. This parameter may have already been defined in the General Particulars and this command enables the user to change that value.

      /SHOW

      Shows the current settings of the Midship parameters.

      Examples

      DEFINE MIDSHIP /BILGE /FLAT 2.34 3.56
      DEFINE MIDSHIP /BILGE /CIRCULAR 2.25
      DEFINE MIDSHIP /TUMBLE /IN 1.5 2.25
      DEFINE MIDSHIP /TUMBLE /OUT 3.56 4.875
      DEFINE MIDSHIP /ROF 1.15
      DEFINE MIDSHIP /FOK 0.550

      Related Links
      TitleResults for “How to create a CRG?”Also Available in