The Desearch Of The Development Of Frontal Crash Dummy Based On The Chinese Human Body

Currently, the Hybrid III50th percentile dummy used in the frontal crash test inChina was developed based on the American human body. Research has shown thatthe occupant restraint system developed based on the Hybrid III50th percentiledummy cannot provides the best protection for Chinese crew. Therefore, it isnecessary to develop the crash test dummy according to Chinese anthropometry. Tothe best of our knowledge, no study of the development of the Chinese50th percentilecrash dummy has been conducted. However, the research on Chinese50th percentilecrash dummy is little, thus putting forward a feasible development method has greatsignificance.To develop the Chinese50th percentile dummy, the most direct way is using thefull body segment scaling method which was put forward by a workgroup formed bySAE (Society of Automotive Engineers). The workgroup using this methodsuccessfully developed the Hybrid-dummy family, including the Hybrid III5thpercentile female dummy,95th percentile male dummy, and the children dummy,based on the Hybrid III50th percentile dummy. The effectiveness of these dummieshas been validated by SAE. However, the great development charges were requireddue to redesigning all of the dummy’s parts in this method. According to the specificdifferences of anthropometric characteristics between Chinese and American, a partialbody segment scaling method was put forward in this study. In this method, only somecomponents which had the significant effect on dummy response (such as, rib, lumbarspine, extremities) were scaled, and the simple parts were adjusted accordingly. Thepartial body segment scaling method can reduce the great charges in the developmentof the Chinese50th dummy.In order to verify the feasibility of the partial body segment scaling method, twoChinese dummies were developed based on a finite element (FE) model of Hybrid III50th percentile dummy by the full scaling method and partial body segments scalingmethod in this study. Two dummy models were coupled with a driver side frontalcollision model to obtain the responses of the dummy models under the different crashconditions. Under the same collision condition and restrained system configurations,the responses of the full scaled dummy and the Hybrid III50th percentile dummywere different. Especially when the upper anchorage of safety belt moving downwardby30mm, the difference of the chest compression between two dummy models was up to22%. Under the different restraint conditions, the trends for the response of twodummies were different when the restrained system parameters were changed. But forthe full scaled and partial body segments scaled Chinese50th percentile dummy, mostof the differences in collision responses were less than7%, and the biggest responsedifference was less than10%. In addition, the trend of responses of two dummies wasconsistent. The results further proved that it is necessary to develop the crash testdummy according to Chinese anthropometric characteristics, and the partial bodysegment scaling method can be used to developing the Chinese50th percentiledummy.Based on the study above, a3D geometry model of Hybrid III50th percentiledummy was developed. And then, based on this geometry model, two3D models ofChinese50th percentile dummy were developed by full scaled and partial bodysegment scaled methods separately. In addition, the head skin mold of Hybrid III50thpercentile dummy was developed and some qualified head skins were produced. Theabove work can provide reference and guidance for developing and producing Chinesedummy.