Thermal Effects (Combined) Analysis
Evaluate squeak and rattle issues when exposed to thermal loading.
A typical challenge faced in the automotive industry is how does the vehicle interior perform under driving conditions while the vehicle has been parked in the sun for many hours?
To answer this question, vibration loads responses (Dynamics) need to be superposed to the temperature effect on parts (Thermal Expansion – Static), gaps are reduced for example. In this workflow, the user will evaluate the squeak and rattle issues in a dynamic condition where the vehicle, in this case, a parked under sunlight with a spike in internal temperature (Static loadcase). Later the car is driven, which is exposed to Dynamic Loading. Below is the illustration of the Driving Vehicle exposed to the Thermal Effects (Combined Loading) workflow.- Prepare the FE model for analyzing Squeak and Rattle issues.
- Apply a static load of amplitude -5.55 to the certain node(s) on Lower Control Panel component. This simulates a touch point scenario.
- Run analysis and post-process the results.
- Use a fresh model and prepare the model analysis setup. For this workflow, refer the following sections from Detailed Risk and Root Cause Analysis:
- Import a model with Dynamic Event loadcase. For this workflow, you can use the model with solver deck created in the Detailed Risk and Root Cause Analysis usecase along with the Dynamic Loadcase.
Choose the workflow according to your need and refer to sections mentioned above for the procedures.
Files Required
Files required to complete the usecase.
Step 5: Thermal Event Definition and Export
Apply thermal loading on the top surface of the IP Substrate and Dashboard Panel.
Define Thermal Loadcase
Below are the steps to create thermal loadcase.
Define Constraint
Export OptiStruct Solver File
.FEM
solver deck
to solve on OptiStruct solver. Once done, two output files are generated:
.H3D
and .PCH
. These files will be used in
the Post Processing of results.Step 6: Post Processing and Results Evaluation
Import model and results file
Use the SnRD Post to post process the results.
Launch HyperWorks X, switch to HyperView client. Select . Preferences window will appear. Select Squeak & Rattle and click Load. This creates SnRD menu in the HyperView window.
Post Process
Perform Full Analysis to understand the Squeak and Rattle risks in the model.
Combined Loading
Perform a Combined Loading study to understand the thermal effects on the squeak and rattle issues under Dynamic Loading condition.