Edit Module

To manage any of the modules shown in the Assembly browser, right-click on a module and select Edit Representations. This opens the Edit Module tab, and the Representation sub-tab is shown.

A module representation is simply a way a module can be represented. Valid representation types can be assigned using the Type drop-down menu and include:

•	CAVITY - a finite element model that contains only fluid elements

•	CMS – an H3D or OP2 based component modal synthesis model

•	CDS – an H3D based component dynamic stiffness model

o	an option to convert test FRFs in UNV format to CDS H3D and define it as module representation

•	FE – typical detailed finite element models

•	DMIG CDTIRE - CDTire model generated from Fraunhofer functionalities

•	FRF – a model containing frequency response functions

•	LP – a lumped parameter model is a simplified 1D finite element model that represents dynamic behavior a more details model

•	MODAL FE - a finite element modal model that contains spring/damper/spoint/mpc elements

•	PLOT FE – a finite element model that contains PLOTEL, PLOTEL3 and PLOTEL4 elements

representation_tab

Right-clicking the white space will give you the options to add, remove, or edit the description of the selected representation.

A file assigned to the root representation can be optionally auto-assigned to be a Display representation (PLOTFE type) simultaneously by checking the Assign file to Display representation checkbox.

A representation can be auto-selected to be the Display representation by checking the Set as Display, load and extract TagPoints checkbox. This will be followed by the file being imported into the 3D graphics window and TagPoints defined in the file extracted.

Once all representations are defined, click the Assembly Browser tab to review the assembly hierarchy with active Display and Analysis representations.

Define Test FRFs (UNV) as module representations

An additional option in CDS-SE allows you to read UNV files that have test FRF information and convert them into a CDS-H3D file. This can then be assigned as module representation.

nvh_rep_tab

Modal model review and parameter modifications

These features allow for the review of modal model parameters of reduced model representations (both CMS-SE and Modal-FE) and modifying them. This will help you in understanding the effect of changing these parameters on NVH responses, without generating reduced models with necessary modifications.

The related list of features for CMS-SE are:

•	Validate SPOINT ids: Allows you to manage ID conflicts between SPOINT IDs of CMS-SE reduced model and module ID ranges.

•	Assign damping: Assign existing damping/add component damping to existing damping in CMS-SE. By default, existing damping while creating CMS-SE is used. There is also an option for adding damping to existing component damping.

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Modal parameters review and modification: Use the ascii option to read modal parameters information from an .ascii file (_dmig_dv.inc) generated during the CMS-SE solver run. Information related to the modal is populated for review. Select Mode to modify the parameters. This will activate the Edit fields to modify frequency and damping values. There is also an option for the mode to be Grounded. Save and apply the changes. This modified information is then exported to the solver deck.

edit_module_options

validate_spoint_ids_dialog

Clicking Validate SPOINT ids opens this dialog

assign_damping_dialog

Clicking Assign damping opens this dialog

validate_spoint_options

create_edit_dialog

Clicking the icon opens the Create/Edit TABDMP1 dialog

For Modal-FE, modal parameters are populated on loading the representation file. The options for review and modifications of parameters are the same as for CMS-SE.

edit_module_representation

A Tagpoint is a special point used in the assembly for connection, input, response and plot purposes. It consists of a grid with a set of relevant properties, such as name, description and dependency.

tagpoints_tab

Tagpoints are displayed in the 3D graphics area and can be customized via the NVH Module Display toolbar. By default, tagpoints are indicated with a gray sphere along with the label. Other options are available using the pull-down menu.

tagpoint_toolbar_menu

To add a tagpoint, right-click inside the tagpoint list in the Tagpoint tab and select Extract All to extract TagPoints from the comments added to the 10th field of the grids in the loaded Display model.

Lock ID

Lock ID’s provide you with a means to maintain the ID’s of tagpoints without getting renumbered by locking them. This prevents accidental renumbering of tagpoints.

Lock ID’s have a higher preference than the sub ranging utility. If ID’s are locked for tagpoints, then sub ranging will not renumber those locked ID’s in Prepare Module mode.

This utility can lock the ID’s of existing tagpoints using edit tagpoints or it can lock the tag ID while creating it using the Create TagPoints utility.

lock_node_id

Locking ID's of tagpoints as and when they are created

edit_module_lock_id

Locking ID's of existing tagpoints

lock_id_tagpoint

Locking ID's of tagpoints through the Tagpoint Mapping tool

Sub ranging

Sub ranging provides you with a means to reserve a range so that it is not occupied and not referred by anybody. This is primarily needed if you want to reserve a certain ID range for a specific use and should not be occupied by other entities.

Some customers follow a convention of reserving the first 10,000 ID’s of nodes for connections for every include. They would like to reserve them at the start and then allocate these ID’s to the tagpoints pertaining to respective includes, by releasing the reserve range, when it is required.

edit_module_subrange

The following images show a sample file with and without sub ranging.

front_stab_bar

Front stab bar without sub ranging

front_stab_bar_with_sub_ranging

Front stab bar with sub ranging

Edit Module

Edit Module

Edit Module

Define Test FRFs (UNV) as module representations

Modal model review and parameter modifications

Lock ID

Sub ranging

See Also: