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Virtual Testing

What is Virtual Testing?

Historically, vehicle crashworthiness regulations and NCAP safety ratings have been based on physical testing alone. This is changing with the advent of virtual testing crashworthiness protocols. Virtual testing protocols aim to improve overall vehicle safety by testing the sensitivity of vehicle designs to a wider range of conditions, while minimising the cost of physical testing.

In virtual testing, a simulation model is validated against a physical test and then – if the validation is deemed acceptable – variations of the test are rated based on simulation results called “virtual loadcases”. Initially, these virtual loadcases will consider variations in impact angle or occupant seating position. In time, they may accommodate the introduction of human body models to augment the traditional use of anthropomorphic test devices. Virtual loadcases aim to improve the safety of vehicles in a greater number of representative real-world scenarios, and for a more diverse range of human physiologies.

Virtual Testing in Oasys LS-DYNA Environment

For the last thirty years, the software has enabled OEMs and their suppliers to develop vehicle designs that meet legal crashworthiness regulations and achieve excellent NCAP safety ratings. Automotive CAE has always been about ensuring that the vehicle performs on test day, so that it can make it to production, and beyond. Now, automotive CAE is itself part of the test.

We recognise the important role that Oasys LS-DYNA Environment can play, so that you can excel at Virtual Testing.

Workflows 22.1 (released with Oasys Suite 22.1)

At Oasys Ltd, we are working on software features to support the Virtual Testing protocols. The Euro NCAP Virtual Far Side Simulation & Assessment Protocol and C-NCAP Far Side Occupant Protection Protocol are already published and are supported in Workflows 22.1. Support for other upcoming protocols will follow in future releases. If you would like early access to an upcoming protocol, please contact us.

Oasys Suite 22.1 contains a set of integrated and complementary Workflow tools to power your Virtual Testing CAE workflows:

  1. Automotive Assessments
    The Automotive Assessments Workflow now includes support for the Euro NCAP and C-NCAP Virtual Far Side Protocols, including the injury metrics that feed into Validation Criterion 2 and Correction Factor A. Automation is available via various REPORTER templates.

  2. LS-DYNA to ISO-MME
    A new workflow tool to convert Ansys LS-DYNA results into the ISO-MME format as specified by the Euro NCAP Virtual Far Side Protocol, ready to upload to the VTC Server. The added REPORTER automation enables you to generate ISO-MME output after each Ansys LS-DYNA job. You can also use the tool to export the channels required by the C-NCAP Far Side Occupant Protection Protocol, to store your results data in a consistent ISO-MME format.

  3. Curve to ISO-MME
    A new workflow tool that enables you to export T/HIS curves in ISO-MME data format without the need of config file.

  4. SimVT
    A new, powerful tool for correlating simulation versus test curves, or indeed any combination of: Ansys LS-DYNA models, ISO-MME data, and CSV data. Supports the ISO/TS 18571:2024 rating method and calculates the ISO Scores used in Validation Criterion 1 of the Euro NCAP Virtual Far Side Protocol, and for the correlation fitting indices for the C-NCAP Far Side Occupant Protection Protocol. Enables detailed analysis of correlation results, so you can improve the validity of your CAE models. Automation available via various REPORTER templates.

  5. VTC Quality Criteria (Euro NCAP | Euro NCAP HBM | C-NCAP)
    New, convenient tools for assessing the quality criteria specified in section 6.1 of the Euro NCAP Virtual Far Side Protocol and appendix H.1.1(f) of the C-NCAP Far Side Occupant Protection Protocol. The added REPORTER automation enables you to check the validity of your CAE models after each Ansys LS-DYNA job.

  6. VTC Videos (Euro NCAP | C-NCAP)
    New, convenient tools for creating the videos specified in section 5.2.1 of the Euro NCAP Virtual Far Side Protocol and table H.8 of the C-NCAP Far Side Occupant Protection Protocol. The tool assists with camera positioning and can be automated to generate videos with your preferred settings.

Further Development

Development does not end with Oasys Suite 22.1. We continue to work on enhancements to the Virtual Testing Workflows, including:

  • Improved usability and automation features
  • Support for other upcoming protocols

If you are interested in early access to the latest features, or if you would like more information or a demonstration of Virtual Testing with Oasys LS-DYNA Environment, please contact Support.




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