Conducting Comparisons of Multi-Body Dynamics Solvers with a Goal of Establishing Future Direction 2023-01-0166

As passenger vehicle design evolves and accelerates, the use of multi-body dynamics solvers has proven to be invaluable in the engineering workflow. MBD solvers allow engineers to build virtual vehicle models that can accurately simulate vehicle responses and calculate internal forces, which previously could only be assessed using physical prototype builds with hundreds of measurement transducers.

Evaluation and selection of solvers within an engineering environment is inherently a multi-dimensional activity that can include ease of use, retention of previously developed expertise, accuracy, speed, and integration with existing analysis processes. We discuss here some of the challenges present in developing capability and accumulating data to support each of these criteria. Developing a pilot model that is capable of being applied to a comprehensive set of use cases, and then verifying those use cases, required significant project management activity. Comparisons were conducted within existing tool chains for capability verification. The highly integrated nature of multi-body dynamics tools encourages collaboration with the solver vendor during the evaluation period. We ultimately considered our evaluation to be successful, thus providing valuable insights into the advantages and disadvantages of the solvers under investigation.