چكيده به لاتين
In this thesis, ergonomic parameters in frontal crash are studied using software simulation. To achieve this, both passenger injury and ergonomy should be considered. At first, ergonomy and injury parameters were extracted separately, including muscle ability criterion downdward visibility and upward visibility in Ergonomy, head injury Criterion (HIC), Viscous Criterion (VC) and Combined Thoracic Index (CTI) in passenger injury. These parameters are extracted using Hybrid III 50th multibody dynamic dummy model in MADYMO software.
Then these parameters are studied using different variables such as seat angle, seat height, seat track, steering wheel column angle and steering wheel column length which can affect passenger Ergonomy directly.
As these variables mentioned can change the distance between passenger, steering wheel and the airbag, two more airbag-related variables are also included. Although these two variables can not affect ergonomy directly, but can decrease injury if they are set to the right value.
To design the experiment and optimization process, response surface method and face-centered central composite design, was used in minitab software.
Due to the nonlinearity and complexity of injury functions, specially HIC, more run experiments were performed to decrease error rate to improve the model. A total of 330 experiment points were executed. a prediction model was extracted for each parameter, Analysis of variance were carried out for all of the outputs and the quality of each model were calculated. Different strategies for optimization were defined and the obtained solutions were examined. Finally, the effect of linear variations of parameters on output criteria was investigated.
