Altair Squeak and Rattle Director 2021.1 Release Notes
The Squeak and Rattle Director (SnRD) has been included in HyperWorks since v.2021. Hence the SnRD pre and post-processing modules are available without any separate installation.
Highlights
The main focus areas for this release are:
- Easy design iteration comparison with an added overview summary in Risk Assessment.
- Enhanced Control of Gap and Tolerance data on E-lines.
New Features
- Gap Assignment Method
- Define which method to use to assign Gap and Tolerance values to E-lines. The assigned gap and tolerance values can be reviewed in E-line Review Table.
-
- Default
- Predefined template values are assigned.
- From DTS File
- Values from the imported DTS file are assigned.
- From FE Model
- The Gap value is determined based on the distance between
two components in the projected direction.
Figure 1.
- Risk Assessment Summary
- A summary of risk for all E-lines in the model, for all loaded design
iterations and load cases, is now provided for easy comparison and
report creation.
Figure 2.
Enhancements
- Review E-line Table
- The Review E-line table has been enhanced and now shows mapped Gap,
Tolerance, and Impulse Rate values for each E-line. The Gap and
tolerance values are assigned based on the choice of Gap Assignment
Method and the Impulse Rate (INV(IR)) is assigned based on the material
mapping. Both can be manually entered and edited in the table. This
enhancement allows you to control and review the output in the
Pre_output.csv file fully before export.
Figure 3. - Realize at Creation of E-lines
- In the Create E-line function, you also have the option to realize the
E-lines directly. This is very useful for automatic E-line creation and
for one at a time creation where you want to review E-line directly.
Figure 4. - Variability Study
- A Details tab has been added in the Review of Variation Studies Table
which provides you with a good overview of all design variables and
allows for editing of variables values.
Figure 5. - Model Import
- Import of model, GD&T data, and Material data from Stick&Slip
test separately is now straightforward. Enable and select only the files
you want to import. As an example, this improvement allows for the
import of new and updated GD&T or material data to an already loaded
model.
Figure 6.
Known Issues
The following known issues will be addressed in a future release as we continuously
improve the performance of the software:
- SnRD Pre
- Long Realization time of E-lines in large models.
- SnRD Post
- Comparison of Squeak Results from multiple load cases is not supported.
Resolved Issues
- All Issues reported in the previous versions are fixed in this version (besides the stated known issues).
- A Stochastics Variability Study now generates a HyperStudy session with a Normal Variance Distribution.