Integrated Diagnostics - Contributions Tab

Perform contribution analysis for the vehicle response between sensitivity and forces, with the respective files loaded in the Loadcase Processing tab, the vehicle response calculated or loaded, and the loadcases selected in the Vehicle Response tab, Powertrain input, or Road Profile input.

Order Contribution Tab

Overall response is plotted after you have selected the powertrain input loadcase in the Vehicle Response tab with the corresponding sensitivity and forces result file in the Loadcase Processing tab. The Order Contribution tab allows you to plot the waterfall diagram and perform order cut analysis.



Figure 1. Order contribution for overall response in powertrain input loadcase
Order Cuts
After viewing the surface plot, use the Start, End, and Step fields to specify the orders you want to see by cutting the surface plot.
Combine Order By - Choose between RSS and Arithmetic Sum to determine how to combine the order curves to construct the overall response.
Display Options
The Display Options dialog allows you to customize the overall response plot, including scale, weighting, and the plot layout.
Load Response
Once your selections are complete, click Load Response to create the orders and order sum response overlay plot.
Bar
Creates a bar plot of the response at a specific frequency or RPM.
Enter a specific RPM in the Specific RPM field, or use the slider bar to select an RPM value. When you use the slider bar to select an RPM, a red line is displayed on the response plot and is dragged simultaneously as you drag the slider bar.
No. of highest order
After selecting the specific RPM, organize the display by selecting the number of highest orders.
Rank by
Define the method that is used to rank orders with one of the following options:
  • Magnitude - Orders are ranked by the magnitude of the order. Available for bar plot.
Display Options
The Display Options dialog allows you to further customize the plot.
Display
Click Display to create and display the plot.
2D Line
Creates a 2-D line plot of the response for a range of frequency or RPM.
RPM range
Select the RPM range that the order curves should be plotted within.
No. of highest order
After defining the RPM range, organize the display by selecting the number of highest orders.
Rank by
Define the method that is used to rank orders with one of the following options:
  • RSS Magnitude - Orders are ranked by the root sum of squares of the magnitude of the order at selected frequencies. Available for 2-D line and 3-D surface plots.
3D Surface
Creates a 3-D Surface plot of the response within an RPM range.
RPM range indicates the available range, based on your results file.
Using the From and To fields, you can customize your own RPM range.
All other options are similar to those for the 2-D Line plot.

Load Path Contribution

After you have selected the powertrain inputs loadcase in the Vehicle Response tab, with the corresponding sensitivity and forces results file in the Loadcase Processing Tab, the Load Path Contribution tab allows you to perform contribution analysis with respect to the sensitivity and forces for an RPM sub-case based on the vehicle response.



Figure 2. Load Path Contribution for RPM based response in powertrain input loadcase
Bar
Creates a bar plot of the response at a specific frequency.
Enter a specific frequency in the Specific Frequency field, or use the slider bar to select a frequency value. When you use the slider bar to select a frequency, a red line is displayed on the response plot and is dragged simultaneously as you drag the slider bar.
Display Options
The Display Options dialog allows you to further customize the plot.
Display
Click Display to create and display the plot.
2D Line
Creates a 2-D line plot of the response for a range of frequency.
Frequency range
Select the frequency range that the response curves should be plotted within.

Wheel Contribution Tab

After you have selected the road profile inputs loadcase in the Vehicle Response tab with the corresponding sensitivity and forces results file in the Sensitivity and Forces Tab, the Wheel Contribution sub-tab allows you to perform a contribution analysis with respect to the wheel contribution and sensitivity for a vehicle response, corresponding to the random loads subcase.



Figure 3. Wheel contribution for random loads subcase, based on response in road profile inputs loadcase
Bar
Creates a bar plot of the response at a specific frequency.
Enter a specific frequency in the Specific Frequency field, or use the slider bar to select a frequency value. When you use the slider bar to select a frequency, a red line is displayed on the response plot and is dragged simultaneously as you drag the slider bar.
Display Options
The Display Options dialog allows you to further customize the plot.
Display
Click Display to create and display the plot.
2D Line
Creates a 2-D line plot of the response for a range of frequency.
Frequency range
Select the frequency range that the response curves should be plotted within.