【摘要】 为获得定墩长间断式直道混凝土护栏的最佳尺寸参数,应用正交试验设计方法,以间断式直道混凝土护栏的5个截面参数为设计变量,每个设计变量考虑了5个水平,基于建立的汽车-护栏碰撞系统动力学模型及LS-DYNA软件,对间断式直道混凝土护栏的25组不同截面参数组合进行了汽车碰撞仿真试验,研究了25组截面参数组合对汽车碰撞过程的影响。仿真结果表明:有2组参数组合的护栏同时满足轮胎完好,护栏完整,头部损伤指标小于1 000的碰撞要求,因此,只要设计参数合理,定墩长间断式混凝土护栏具有较强的吸能能力与引导失控车辆返回正确行驶方向的导向能力,具有良好的工程应用特性。更多还原

【Abstract】 In order to obtain the optimal structure parameters of interrupted type straight-road concrete barrier with given length concrete frusta,the orthogonal experimental design method was used,5 section parameters of the barrier were taken as design variables,each design variable had 5 levels,based on vehicle-barrier collision system dynamics model and LS-DYNA software,vehicle-barrier collision simulation test with 25 group section parameter combinations was carried,and the influence of section parameter combinations on vehicle collision was studied.Simulation result shows that the barriers with 2 group section parameter combinations meet the collision requests that tire and barrier are intact,the head injury criterion is less than 1 000,the barrier has a strong energy-absorption capacity,and can guide the vehicle out of control to the right direetion as long as its design parameters are reasonable,so it has good characteristics for engineering application.更多还原