The physical dummy tests how well a person is protected from injury in a rear-end collision, according to the Insurance Institute for Highway Safety. The dummy represents an average-size (50th percentile) man with a spine composed of 24 articulated vertebra-like pieces, re-creating how the spine interacts with vehicle seats. Used during the design phase of seats and head restraints, the BioRID model will help engineers assess and reduce the risk of neck injuries by giving them a simulation tool to augment physical crash data.
“We are incorporating its usage as an integral part of our product development process,” stated Laurent Guerin, Simulation Methods Manager, Automotive Seating Product Group, Faurecia.
The Abaqus BioRID II simulation model takes advantage of unique Abaqus technology to represent the complex neck and spine construction of the physical BioRID II dummy. “Abaqus ‘connector elements’ are used for various purposes throughout the BioRID II model,” explained Marc Schrank, Director of Crashworthiness and Occupant Safety for Simulia. “These connector elements provide an accurate and efficient means to capture the behavior of various joints in the neck and spine. They also model the cables and damper mechanism that are part of this physical construction. Connector elements are used to model the various measuring devices in the dummy, such as accelerometers and load cells.” Connectors improve runtime efficiency by reducing the number of degrees of freedom in the model, according to Simulia. More than 200 connector elements are used.
Schrank noted that this is important in the expansion of automotive safety solutions offered by Simulia. “We are presently involved with another dummy modeling project for the WorldSID 50th percentile crash dummy, sponsored by the PDB (Partnership for Dummy Technology and Biomechanics) in Germany,” he said. “In addition, we have a partnership agreement with FTSS (First Technology Safety Systems), whereby FTSS develops and provides a number of other dummy models for Abaqus, including EuroSID-2; SID IIs; Hybrid III 5th, 50th, 95th.”