货车尾部护栏缓撞性能的研究

Study of Truck Rear Bumper Crashworthiness

货车尾部护栏缓撞性能的优劣直接影响到与其发生追尾碰撞的其它车辆损坏和乘员伤亡的严重程度。用三维动态非线性有限元方法模拟计算了护栏横梁的碰撞过程 ,并进行了试验研究 ,在此基础上进一步改善槽形截面横梁的缓撞性能 ,在其碰撞表面加装了筒系吸能装置。计算和试验结果表明 。

When passenger cars crash into the rear end of heavy trucks,the degree of cars occupants' injury and cars damages depends on weather the crashworthiness of the truck rear bumpers are good or not.The dynamic three dimensional non linear finite element methods are adopted to simulate the impact of truck rear bumper for the investigation of its crashworthiness.And some impact tests are carried out.Based on this,tubes' system is installed on the impact surface of the bumper horizontal beam as an energy absorption device to improve the beam's impact performace. Simulation and test results of the improved bumper show that this device leads the deceleration of the moving barrier crashing into the bumper decreased obviously.