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Driveline SimApp™

Drivelines are complex systems requiring consideration of multi-discipline performance attributes including NVH (noise, vibration, & harshness), structural integrity (stress, strain, and fatigue), nonlinear analysis (contact between components), thermal analysis (heat transfer and dissipation), and gear analysis (load transfer, gear ratios).

The design validation and verification activity typically include linear and non-linear FEA, thermal FEA, and gear analysis tools, each run by different experts. The disconnected, isolated approach to evaluating overall axle system performance typically leads to many design rework cycles and design “turn-backs” as experts deal with frequent unanticipated changes as the design evolves.

Modeling and analysis of vehicle driveline systems also includes a tedious and time consuming effort to prepare and analyze models, extract results, and create reports to share with design and engineering teams. As there are multiple load cases to evaluate and many possible design variations, the iterative process of finding a design that works can take weeks. Even then, a design that “works” may be far from the optimal design.

The Comet Driveline Design SimApp™ sets up and utilizes libraries of parameterized “3-D”, “2-D”, “1-D” and “0-D” (mixed fidelity) representations of prop-shafts and axles to fully automate the configuration and analysis of complete axle systems. This application establishes a single environment for axle system design that allows quick and easy evaluation of any axle geometry, without the manual effort.


  • Fully automated – user configures the driveline and runs using combinations of mixed fidelity (0-D to 3-D) representations of the driveline system
  • Single, consistent Systems Repository for Shafts, Axles, Housings, and Dynos
  • Standardized and enforced nomenclature and best practices, across the global organization
  • Can be made accessible remotely via Web
  • Does not need experts
  • Fully automated results extraction and report generation


  • Engineers are able to rapidly configure an axle design, choosing from libraries of housings, prop-shafts, and axles
  • Standardization of nomenclature, finite element model generation and key results extraction across the global organization
  • With full automation, engineers and designers are able to perform Design Space Exploration (parameter studies, Design-Of-Experiments, optimization) that includes geometry and product configuration changes
  • Reduction of >80% in model preparation, results extraction and report generation time for each design iteration and loading scenario

See the Ora Research Whitepaper detailing the benefits of a driveline NVH SimApp.