A Study On Safety For Different Shape Male Driver In Vehicle Frontal Impact

With the increasing number of car ownership,the occurrence of road traffic accidents is still high,the casualties and property caused by the accidents are very serious.In the form of all road traffic accidents,the frontal collision is not only the largest proportion,but also the damage to the passengers.Occupant restraint system plays a vital role in reducing the degree of injury in the vehicle.Research shows that,at this stage of the occupant restraint system only for the standard figure driver can play a good protective effect,not suitable for other nonstandard figure drivers.Influence of different countries and regions,race and gender,the body size of human there are significant differences,with the improvement of people's material level,the human obesity rate is also growing fast,number of obese driver is also increasing,this leads to the driver's body difference is increasingly obvious,so in the process of vehicle safety evaluation and vehicle model development should take into account the influence of the driver's body difference.With the rapid development and wide application of electronic information and image recognition technology,researchers at home and abroad have begun to develop a kind of intelligent restraint system which can adapt to various body attributes and collision conditions.The system can obtain environmental characteristics before the collision using cameras and sensors,and adjust the occupant restraint system parameters to achieve the best protection effect,the development of this system plays an important role in improving the safety of drivers of different sizes.In order to study the influence of the difference of body shape on the safety of the male driver in vehicle frontal impact,and further promote the development of the occupant restraint system,the driving side simulation model of a certain type of vehicle is established by using MADYMO software based on the US-NCAP crash test data in this paper,and the model is verified.8 male driver models with different sizes were established by using the MADYMO software human body modeling method,and the 8 models were introduced respectively into the vehicle model,and the simulation experiments were carried out with 56km/h and 66km/h respectively.Weight and height on the impact of the risk of injury of male driver in the vehicle frontal impact were investigated respectively by single factor test method,assessing the safety of different shape male driver in impact by contrasted with evaluation criteria,such as occupant injury index in FMVSS208 and body WIC(weighted injury criteria),and according to the process of male driver's different body movement response in the collision to conduct in-depth research on the damage mechanism.The research results show that the damage risk of different weight male drivers will increase with the increase of body weight in vehicle frontal impact,the risk of injury of male drivers of different height will change with the trend showed first decreased and then increased with increasing its height.The main reason why heavier male drivers have the higher risk of injury in impact is the kinetic energy of heavier male drivers is larger,and the main reason why male drivers of different height have different injury risk is they have different distance between drivers and steering wheel before vehicle impact.When male driver longitudinal position is in the standard position in vehicle frontal impact,the protective effect for driver of restraint system is the best In the end,a real accident case is analyzed by using PC-Crash and MADYMO,and the damage mechanism of the driver in this case is analyzed,the results are consistent with the true state of the case in this paper.