主动式座椅参数对其正面碰撞乘员保护性能影响的研究

A Study on the Effects of Active Seat Parameters on Its Occupant Protection Performance in Frontal Crash

本文旨在研究正面碰撞中座椅参数对乘员保护效果的影响。首先依据某一轿车副驾驶员座椅相关尺寸设计了简化的台车约束系统试验装置,建立了带Hybrid III 50th假人的约束系统有限元仿真模型,并通过台车试验验证了其有效性。接着采用最优拉丁方试验设计和Kriging模型,对座椅前后位置、坐垫高度、坐垫倾角和靠背倾角等4个参数进行了优化。确定了正面碰撞时座椅的最佳参数:座椅从中间位置向后移动111.5mm、坐垫高度56.99mm、坐垫倾角22.76°、靠背倾角29.33°。最后,基于座椅最佳参数再次进行仿真的结果,加权损伤指标降低了15.77%。

In this paper the effects of seat parameters on its occupant protection performance in frontal crash are studied. Firstly a simplified sled test device for restraint system is designed based on the relevant dimension of front passenger seat of a car, and a finite element simulation model for restraint system with Hybrid Ⅲ 50th percen-tile dummy is built, with its effectiveness verified by sled test. Then with optimal Latin hypercube design of experi-ment and Kriging model adopted, an optimization is conducted on four seat parameters （ seat position, cushion height and angle and backrest inclination） with the optimum seat parameters obtained, i.e. seat position：111. 5mm rearward from midway, cushion height：56. 99mm upward from its lowest position, cushion angle： turning 22. 76° backward from horizontal and backrest inclination：rotating 29. 33°backward from the upright position. Finally a sim-ulation is performed again with the optimum seat parameters, resulting in a 15. 77%reduction of weighted injury cri-terion.