Car After The Collision The Best Occupant Protection Posture Simulation Study

With the improvement of traffic condition of our country, the quantity of vehicle increase very rapidly and the velocity improve step by step, the amount of traffic accident and injured occupant become more and more in the last years.The active safety technology play an important act.Althought it can not prevent the traffic accident.Only the passive safety technology can avoid damage to occupant. In order to control and prevent traffic accident effectively, the safety technology is significant.In the process of safety research, the cash experiment of vehicle is the most reliable ,but it damage vehicle and it is expensive. Therefore , simulation in the computer is the better research method . Not only it is cheap but also it can use more than one time. It promotes applyment and development of computer in the field of vehicle safety technology.Analyse the occupant protect device-safety belt and safety air bagprotect occupant after vehicle cash and their real condition; Narrate the best posture of occupant introduce and analyse safety mechanism.The aim of the research is that useing safety mechanism avoid or decrease the damage to the occupant to meet the need of the passive safety. Before the second cash,the safety mechanism benefit occupant to safe condition. The safety mechanism is very cheap and it can be bought by most consumer.Based on the multi-body dynamics Roberson-Wittenburg Formula, a mathematical modle of the "occupant-seat-safety mechanism" system was built,and its kinematic equation was given.The corresponding computer programme was based on the equation, kinematic equation can provide advice for safety mechanism and serve for computer imotion.R/W and Kane set up their own formula.They both can prove safety mechanism is benfit to occupant.