Delta-V Analysis

When a vehicle experiences a significant amount of rotation over a relatively short period of time within the crash sequence, the method for calculating the delta-V (the change in speed of a vehicle from its pre-impact speed to its post-impact speed) becomes more complex. Issues like localized delta-V (the change in speed at different areas within the vehicle) must be carefully considered by the accident reconstructionist.

In this case, the vehicle of interest rotated rapidly as a result of the collision and the topography of the roadway. An ARCCA accident reconstructionist utilized a TOPCON 3-D laser scanning tool to accurately measure the scene to calculate the specific Delta-V’s and forces experienced by each occupant in the vehicle. This occupant-specific information was then used by an ARCCA biomechanical engineer to analyze the rotation and determine the cause of injury.