ReleaseNotes 5 8 Rev1

8/10/2019 ReleaseNotes 5 8 Rev1

http://slidepdf.com/reader/full/releasenotes-5-8-rev1 1/7

VeriSTAR Hull 5.8 Rev 1 Release Notes July 16, 2014

1 / 7

VeriSTAR Hull 5.8 Rev 1 Release Notes

It is necessary to uninstall the previous version before installing the new one.

Software requirementsThis version of VeriSTAR Hull needs the following software to be installed on your

computer:

• FEMAP V9.3.1

• Microsoft .NET Framework 4.0

Functions and limitations

Applied rules

This version complies with the following set of rules:

Set of Rules Effective Date Global Strength

(Yielding &

Buckling criteria)

Local Fine

Mesh

(Yielding

criteria)

Fatigue

CSR for Double Hull Oil Tankers July 2012 √ √ √

CSR for Bulk Carrier July 2012 √ √ √

BV Rules for Steel Ships (1) July 2014 √ √ √

BV Rules for Offshore Units (1) April 2014 √ √ √

CSR-H January 2014 √ √ √

(1) Ships or units with Type B independent tank are not managed.

Known bugs• When FEMAP selection list is active and contains elements, the VH5 commands

that should display the FEMAP selection box are simply taking the content of the

selection list. In such a case, previously selected elements will be lost. When this

happens, Undo command will revert to previous selection.

•

A bug in FEMAP makes the BV ratio color scale become partly or completely red.The workaround solution is described in the VH5 Help: use the FEMAP view

option (F6) to modify the “Contour/Criteria Levels” option to another setting then

back to the same setting.

Tips and advice

Windows 7

With Windows 7, it is necessary to modify the rights of FEMAP 9.31. To do that, please

follow this procedure:

•

Right click on FEMAP.exe -> Tab Compatibility -> Active the option "Executewith administrator right" (last option in the window),




2 / 7

• Log off,

• Log on,

• Launch FEMAP and close the application,

• Launch VeriSTAR Hull.

Backup filesVeriSTAR Hull includes a “user preference” about creating a backup file before saving the

model. This option allows to recover a previous state of the model in case a problem occurs

while the model is saved, thus corrupting the last file.

It is highly advisable to activate this backup file option (File -> Preferences) in order to

protect your data from any problem occurring while saving the model.

FEMAP Network licenses

Some users reported a problem using the network licenses. This problem started using

FEMAP 9.2, and is due to an insufficient timeout delay in the network license system.If you encounter such a problem, the solution is to define a sufficient timeout delay using an

environment variable on your computer. The variable is named FLEXLM_TIMEOUT and we

suggest to give it the value 5000000 (corresponding to a 5 second timeout). If you need help

in order to define this environment variable, please contact your local IT support.

Large models management advice

• For VeriSTAR Hull - only for 32 bits operating system:By default, the memory available for each application is 2 GB on Windows 32 Bits. For large

models, it is not sufficient and "Out of Memory" exception may be occurred.

To fix this problem, it is possible to modify this default value in the file: boot.ini according

the following procedure:1. Right-click My Computer and select Properties. The System Properties dialog box will

appear.

2. Click the Advanced tab.

3.

In the Startup and Recovery area, click Settings. The Startup and Recovery dialog box

will appear.

4. In the System startup area, click Edit. This will open the Windows boot.ini file in

Notepad.

5. In the [Operating Systems] section, add the following switches to the end of the

startup line that includes the /fastdetect switch: /3GB

6. Save the changes and close Notepad.

7.

Click OK two times to close the open dialog boxes, and then restart the computer for

the change to take effect..

• For FEMAP:Run FEMAP alone and go into the menu File / Preferences / Database.

Starting with Femap version 9.3.1, simplified memory settings are used. The “database

memory limit” i.e. the maximum size of Femap database that can be handled in memory is

directly set using a slider.

The default setting is 20% of the available memory. Although it is not recommended in

Femap user guide, this can be slightly increased in order to preserve performance on bigger

models.




3 / 7

Then click Ok to save preferences. The next time you will run VeriSTAR Hull these new

parameters will be active.

Note that, as soon as the database size exceeds the database memory limit the performance is

reduced and almost constant versus memory. Database size is available using List / Model

Info

For more detailed information please refer to the FEMAP User Guide 3.4.2.

• For NASTRAN:To fully use this amount of memory you have to set some specific values in the nastran

configuration file. This file is located in the FEMAP install folder:…/FEMAP/Nastran/conf/nas4.rcf

For RAM of 2 GB the lines are:

• Buffsize=32769

• nastran system(151)=1

If the CPU is divided, add the command: nastran parallel = n (n: number of CPU) in thenastran configuration file to use all CPU.

For large model, add the command: SYSTEM(206)=9




4 / 7

Release 5.8 Rev 1

General

Ship Modeling / Property interface

Full update of the property interface to manage: T/L stiffener shape rolled or built-up and bulb profile:

H shape, circular tube, rectangular tube:

Gap property for ships or units with independent tanks:

Due to this new feature, the corrosion and buckling processes are also updated.




5 / 7

BV Rules for Steel Ships

Amendments July 2014 - Added a testing condition for container ship

In global and local loading conditions, added a specific loading pattern: Testing

(available only for container ship).

In the calculation model definition, added a specific assessment area: Testing.

Update of the load process to take into account the testing pressure.

Update of the post-processing to take into account the specific partial safety factors

for the testing condition (γR =γM =1.02).




6 / 7

Using solid mass in 3 holds model analysis

Generalisation of the solid mass approach:

Solid Mass interface to define specific mass:

In the General and Local Loading Conditions interface, tab to select the active

solid mass for the selected loading condition:

In Ship Modeling, interface to define the support nodes of solid mass:

Update of the load and balancing processes to take into account the forces on the

support nodes due to the rule acceleration of the solid mass.

Taking into account forces induced by the solid mass in the top down:

Automatic detection of the solid mass support nodes during the lock of the top

down.

New interface to re-define, if necessary, the solid mass support nodes based on

the top down mesh.

Update of the top down load process to take into account theses forces.




7 / 7

BV Rules for Steel Ships and BV Offshore Rules

In the solid and concentrated mass interfaces, new tool to find automatically the

association between the RBE3 elements of the FEM model and the solid/

concentrated mass defined in the VeriSTAR Hull database.

Bugs fixed in version 5.8 Rev 1

The following bug or problem has been solved:

In the import tool, VeriSTAR Hull crashed if mass elements were defined in the

neutral file.

Documents

ReleaseNotes 5 8 Rev1