Transfer Path Analysis - Load

Load a file and view transfer path details.

File Selection

File selection
From Load tab > File selection, select from the following file types:
Configuration
Select a previously saved .csv file and click Load. The Path identification fields are populated in the section below.
Transfer Function
Select one of the following file types, where Transfer Function output is available.
  • OptiStruct .pch or .h3d file
  • Nastran .pch file
  • Test .unv file
Force
Select one of the following file types, where Force output is available, then click Load.
  • OptiStruct .pch or .h3d file
  • Nastran .pch file
  • Test .unv file

Path

After you've loaded a file, Load > Path data is populated.
  • Click Path Details to view transfer path details, or Apply to confirm the path detail configuration.
Move to the Load > Subcase tab. Control volume is an advanced functionality that will be implemented in a future release.

If the Transfer function field is populated, but the Force field is left blank, you will be asked to confirm that you intend to proceed with the TPA analysis with assumed forces.

If you click Yes, a dialog is displayed. From this dialog, you can either accept the default unit forces or enter another scalar (target) value, which will be used to generate an assumed force file for use in the TPA analysis.

Subcase

Subcase identification identifies the subcase type and the subcase ID to RPM or principal component relationship.

If subcase is General, simply select a subcase and click Apply to move to Load > Response.

If subcase is Spindle Loads - Selected, then the subcases are interpreted as subcases related to principal components to be used as spindle input for TPA analysis.

If subcase is Engine Loads - Selected, then subcases are interpreted as subcases related to input at various RPMs to be used for TPA analysis.

Response

Result selection
The following fields are available under Result selection.
Subcase
Select an analysis subcase.
Result type
Select one of the available result types.
Response ID
Grid ID of the response for which Modal/Panel participation results are available. Select a response ID from the list.
Response label (optional)
Enter a label that describes the response, for example "Driver’s Ear".
Direction component
X, Y, or Z.
Contribution analysis
The following fields are available under Contribution analysis. Once the result selection options are complete, select Load Response to further investigate the contributions.
Sum paths by
Select how contributions from various paths are to be summed.
Sum subcases by
Select how contributions from subcases are to be summed.
Generate all path contribution plots
When checked, contribution plots of all paths are generated with three paths on each page.
Display Options
The Display Options dialog allows you to customize the response plot, including scale, weighting, and the plot layout.
Load Response
Once the result selection options are complete, select Load Response to display the file data.
Figure 1. Path contribution plots