Important Modeling Practices in CAE Simulation for Vehicle Pitch and Drop

2012

Open Engineering

The behaviour of a vehicle at high-speed crashes is enhanced by using active vehicle dynamics control systems.A 6-Degree-of-Freedom (6-DOF) mathematical model is developed to carry out this study. In this model, vehicle dynamics is studied together with vehicle crash structural dynamics. Validation of the vehicle crash structure of the proposed model is achieved to ensure that the modelling of the crumble zone and the dynamic responses are reliable. Five different speeds are selected to investigate the robustness of control system and its effect on the vehicle crash characteristics at low and high speeds with full and offset collision scenarios. A great improvement of vehicle pitch and yaw angels and accelerations at high speed collision are obtained from this analysis.

Section: Introductionmentioning

confidence: 99%

Modelling and analysis of vehicle crash system integrated with different VDCS under high speed impacts

Elkady¹,

2012

Open Engineering

“…The vehicle body pitch and drop at fontal impact is the main reason for the unbelted driver neck and head injury (Chang et al, 2006) . Vehicle pitch and drop are normally experienced at frontal crash tests.…”

Section: Introductionmentioning

confidence: 99%

Multi-Body Integrated Vehicle-Occupant Models for Collision Mitigation and Vehicle Safety using Dynamics Control Systems

International Journal of System Dynamics Applications

MacIntyre

Alhariri

et al. 2016

“…[10][11][12] Vehicle body pitch and drop have normally been experienced in frontal crash tests. Chang et al 10 used a finite element method to investigate frame deformation upon full-frontal impact and discussed the cause and countermeasures design regarding vehicle body pitch and drop.…”

Section: Introductionmentioning

confidence: 99%

The influence of a vehicle dynamics control system on the occupant’s dynamic response during a vehicle collision

Elkady

Proceedings of the Institution of Mechanical Engineers, Part D:

MacIntyre

2012

This paper aims to apply a vehicle dynamics control system to mitigate a vehicle collision and to study the effects of this systems on the kinematic behaviour of the vehicle's occupant. A unique three-degree-of-freedom vehicle dynamics-crash mathematical model and a simplified lumped-mass occupant model are developed. The first model is used to define the vehicle body's crash parameters and it integrates a vehicle dynamics model with a model of the vehicle's front-end structure. In this model, the anti-lock braking system and the active suspension control system are co-simulated, and the associated equations of motion are developed. The second model aims to predict the effect of the vehicle dynamics control system on the kinematics of the occupant. The Lagrange equations are used to solve that model owing to the complexity of the obtained equations of motion. It is shown from the numerical simulations that the vehicle dynamics-crash response and occupant behaviour can be captured and analysed quickly and accurately. Furthermore, it is shown that the vehicle dynamics control system can affect the crash characteristics positively and that the occupant's behaviour is improved.