Abstract: In order to obtain the law of the influence of some key parameters of car seat on the results of whiplash test, both computer simulation and test are conducted, and the results of simulation are compared with test data. After the feasibility and accuracy of simulation are verified, a few rounds of simulations are carried out. The results show that the smaller the backrest stiffness and the greater the rotational stiffness of backrest, the higher score the whiplash test will get, with the effect of backrest stiffness is more obvious than that of rotational stiffness. The greater the headrest stiffness and the headrest rotational stiffness, the higher score the whiplash test will get, in which the effect of headrest rotation stiffness is more obvious. The higher the headrest and the smaller the headrest back gap, the higher score the whiplash test will get.

Key words: car seat, headrest, whiplash test, simulation