SESAM软件GeniE建模自学手册大全A4_GeniE_Semisub_PanelModel

SESAM

Part 0 - General

Modelling Panel Models

Modelling in GeniE

SESAM Tutorial in Panel Modelling

Making a panel model including tanks

•••The purpose of this workshop is to show how to make a parametric input file (journal file)

to create a panel model of a semi-submersible.

The tutorial is based on a pre-defined input file where main dimensions of the semi-submersible are variables. This means that by changing the variables in the journal file

prior to reading it into GeniE different panel models may be created.

The objective is that the user will gain experiences from learning how the journal file has

been built up. The journal file was build from a combination of editing a journal file and a

graphic modelling session where the input is based on the variables and not coordinate

values as for normal modelling. The journal file contains comments so that the user easily

can understand the steps.

The tutorial is meant for the user that has enough knowledge in GeniE to understand how

journal files may be created for advanced usage. The user does not need to know

programming in scripting language – if so the journal input file may be even more

advanced.

•••The panel model that will be created by reading in the journal file is a semi-submersible

with 8 columns and 4 tanks, one in each end of the pontoons.

The journal file will create a finite element mesh and export a FEM-file called

Semi_sub_panel_ to the directory where you have saved the input journal file. This

file may be used by HydroD for stability or hydrodynamic analysis.

DNV Software – Genie Parametric Panel Model

Revised 12 March 2011

DET NORSKE VERITAS

1

SESAM

Part 1 – Main dimensions

Modelling Panel Models

Modelling in GeniE

•The main dimensions of the platform are variables, seen from the side

Pon_Length

CC_Large CC_Small

X

Depth

CC_Columns

Z

Y

CC_Columns/2

Pon_Depth

Rad_Large Rad_Small Rad_Small Rad_Large

Col_Height

Z

Pon_Height

•The main dimensions, seen from top

Col_Height

Pon_Height

DNV Software – Genie Parametric Panel Model

Revised 12 March 2011

DET NORSKE VERITAS

Depth

2

SESAM

Part 2 – Default variables

Modelling Panel Models

Modelling in GeniE

•The variables as defined in the predefined journal file

For references, see previous page

The settings for number of elements along a line Md_Line are used

to control the mesh around the column and along the height of the

pontoon

•Mesh details changing default values

6 elements on a quarter part of column

6 elements along height of pontoon

DNV Software – Genie Parametric Panel Model

Revised 12 March 2011

DET NORSKE VERITAS

3

SESAM

Part 2 – Default variables

Modelling Panel Models

Modelling in GeniE

•The variables as defined in the predefined journal file

Using the default values gives the following

DNV Software – Genie Parametric Panel Model

Revised 12 March 2011

DET NORSKE VERITAS

4

SESAM

Part 2 – Default variables

Modelling Panel Models

Modelling in GeniE

•The variables as defined in the predefined journal file

Using the default values gives the following dummy hydro pressure

and tank fillings needed by HydroD

There are 4 tanks, one in each corner

DNV Software – Genie Parametric Panel Model

Revised 12 March 2011

DET NORSKE VERITAS

5

SESAM

Part 3 – Changing variables

Modelling Panel Models

Modelling in GeniE

•Changing pontoon height and diameter of small column gives the

following

Pon_Height=12m and Rad_Small=4m

The tanks change accordingly

DNV Software – Genie Parametric Panel Model

Revised 12 March 2011

DET NORSKE VERITAS

Default

values

6

SESAM

Part 4 – The journal file

Modelling Panel Models

Modelling in GeniE

•An example on how the journal file has been built up

The variables may be changed from editing the journal file

The variables are used in all relevant commands to generate the

structure and the panel modelling

All steps have comments so it is easy to understand the sequence of

commands and modelling

DNV Software – Genie Parametric Panel Model

Revised 12 March 2011

DET NORSKE VERITAS

7

SESAM

Part 5 – The panel model

Modelling Panel Models

Modelling in GeniE

•The complete finite element model

Created in GeniE and includes necessary data for HydroD, tank4

shown

Model imported to HydroD, some of the tanks are filled and

equilibrium position is computed

DNV Software – Genie Parametric Panel Model

Revised 12 March 2011

DET NORSKE VERITAS

8