| Summary: | 碩士 === 國立彰化師範大學 === 機電工程學系 === 100 === Along with the automobile industry vigorous development, the car accidents become more and more frequently. The rear collision of the vehicle accounts for a big proportion of traffic accident death. Therefore, how to keep the automotive head restraint safety to protect the occupant's head and reduce the head injuries caused by the rear collision is an important issue . This study will focus on the headrestraint bracket structure of the vehicle. And the method of optimizing the structure geometry which will reduce the risk of injury for the occupant's head .
The head restraint of UNECE(United Nations Economic Commission for Europe) regulation No.25, sets out the test standard for the head restraint safety. The one of it is headform impact test. This test simulates the occupant's head to withstand the energy of the impact . In this study, the vehicle head restraint bracket structure is disussed an want through this standard.
In this study, finite element method is used to analyze the impact of the occupant's head. The study can be divided into three steps. First, a specific structure of the head restraint bracket is selected and the material properties of the bracket is obtained, according to the impact test of the UNECE No. 25. Test on the head restraint bracket is serified to obtain the energy absorption value. The second step is to create a finite element model of the head restraint bracket structure. Comparisons of the model and test results are to ensure the model with authenticity. Finally, to improve the head restraint bracket structure design is the third step, Application of Taguchi method is used the to optimize head restraint geometry for reducing the impact of head injury.
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