Validation of a PC-Crash Multibody Sport Bike Motorcycle Model 2021-01-0893
PC-Crash is an accident reconstruction program that allows the user to run simulations with multibody objects that collide or interact with 3D vehicle mesh models. For example, the multibody systems can be a pedestrian, a motorcycle by itself, or a pedestrian riding a motorcycle. The multibody systems are comprised of rigid bodies interconnected by joints. The individual bodies can be of various size and stiffness along with varying coefficients of friction and restitution. Likewise, the joints can be tailored to define pivot types and range of motion. The current motorcycle models in PC-Crash are limited to generic-type motorcycles. Furthermore, they are only globally scalable such that you cannot adjust length, width, or height independently. For example, it would not be possible to adjust the wheelbase (overall length) while maintaining a constant seat height.
With the help of the program developer, a model was created that resembled the modern sport bike. In addition, a pedestrian model is mounted on the motorcycle in a typical sport bike riding position. The model was validated using the three instrumented tests that were the subject of previous research by the author (SAE 2020-01-0885). The aforementioned three tests involved moving motorcycle to moving car tests. Impact configurations involved the classic T-bone type accident, while others were more complex in nature involving significant longitudinal and lateral impact forces to the motorcycle.
The testing results were compared to parameters calculated in the PC-Crash program. Results such as Delta-V, yaw rate and overall post impact trajectories of the motorcycle, rider, and movement of the target vehicle were compared.
Edward Fatzinger, Jon Landerville, Jose Tovar, Benjamin Nguyen