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Squeak and Rattle
Create and evaluate evaluation lines and optimize interfaces to eliminate squeak and rattle issues.
Pre-Processing
Explore the SnRD Pre-Processing user interface.
Analyze
Evaluate loadcase and export solver deck.
Risk Assessment
Assess the squeak and rattle risks by viewing the results from the squeak and rattle analyses.

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High Frequency NVH
High frequency NVH is an implementation of Statistical Energy Analysis (SEA), and is used to predict and analyze the vibration and acoustic response of complex dynamic systems.
Squeak and Rattle
Create and evaluate evaluation lines and optimize interfaces to eliminate squeak and rattle issues.
- Technical Concepts
  Technology and problem evaluation approaches used in SnRD.
- Launch Squeak and Rattle Director
- Pre-Processing
  Explore the SnRD Pre-Processing user interface.
  - Setup
    Use the tools in the Setup Group to setup evaluation lines and define loadcases.
  - Analyze
    Evaluate loadcase and export solver deck.
    - Review Loadcases
      Use the Review Loadcases tool to review loadcases present in the model and choose which loadcases to export in the OptiStruct solver file.
    - Model Export
      Use the Export tool to export loadcases and variability studies.
    - Risk Assessment
      Assess the squeak and rattle risks by viewing the results from the squeak and rattle analyses.
      - Perform Risk Assessment
      - Rattle Evaluation
        The automatic assessment allows the understanding of the rattle phenomena using the following:
      - Squeak Evaluation
        The automatic assessment allows the understanding of the squeak phenomena using the following:
    - Report
      Create a summary report for the risk assessment of the squeak and rattle analysis.
- Post Processing
  Launch and explore SnRD Post Processing.
- Ziegler PEM Material Database
  Use of Altair Ziegler SnRD Material Database.

Risk Assessment

Assess the squeak and rattle risks by viewing the results from the squeak and rattle analyses.

For risk assessment, you will need a result file from analysis in OptiStruct containing relative displacement output for all defined E-Lines.

In risk assessment, the results from three types of events are reviewed: dynamic, static, and thermal. Evaluation of rattle and squeak E-Lines are done separately.