Study On Front Passengers Injury In Front Crash Under Euro-NCAP

Wit h the change of social-econo mic structure, female consciousness and social status, the number o f wo men invo lved in the traffic behavior increases every year. Traffic trends indicate that future female drivers may be equally as likely to be invo lved in a crash. It is necessary that motor vehicle safet y systems provide equitable injury protect ion to occupants o f either sex invo lved in moderate to serious crashes. Owing to the relat ively high exposure and fatal crash invo lvement rate, standard adult occupant safet y systems have been designed and evalua ted with a focus on the occupant characterist ics t ypically represent ing the male populat ion. It should be noted that the effectiveness o f such safety devices is sensit ive to occupant age, anthropo metric size, injury to lerance, and the mechanical response o f the affected body region. Because sex is expected to be highly correlated with these variables(except age), current advances in safet y technology opt imized for male characterist ics may not be equally effect ive in protecting female occupants. Thus, many internat ional generally accepted passive safet y assessment tests have added female dummy to be evaluat ion objects. Alo ng wit h those changes is the increasing concern of the Auto co mpanies to the performance o f passive safet y devices. However, there are few studies o f female occupant protection.To make up the above shortco mings, Hybrid III 5th female dummy was used for this purpose. The main content o f this dissertation are shown as fo llowing:1. Mult i-body models o f frontal full width impact with Hybrid III 5th dummies seated in the driver posit ion and front passenger posit ion were established and validated based on the date and descript ion of an impact test. A parametric study was performed to invest igate the efficacy of restraint system. Auto mat ic computat io n between parameters and models was achieved with MADYMO and MODEFRONTIER, and parametric sensit ivit y analysis was done.2. Latin Hypercube Sampling was used to opt imize the constraint system parameters, which results in poorest driver injury, and the best c onstraint system parameters were obtained.3. A co mparison o f dummy responses in two matched frontal tests and an invest igat ion o f NASS ‐CDS data with belted occupants invo lved in frontal vehicle crashes were done to obtain the difference in injury patterns.The results suggest that dominat ing factors to responses of each body region are different for driver and front passenger. Parameters of restraint system have greater influence on head responses and less influence on chest responses for front row occupants. After parameter optimizat ion, injury risks o f head and neck for restrained front row occupants have decreased, and the Euro-NCAP score of front row restraint increased by 37.3%. The injury to small female drivers caused by airbag is much higher than male drivers. Seatbelt load is the main factor of female occupant chest AIS 3+ injury. And the airbag has litt le effect on small female right passenger.