低地板列车吸能防爬装置的碰撞特性研究
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摘要
为研究某型低地板列车的吸能防爬装置的吸能防爬特性,提高车体结构的正面耐碰撞性,运用非线性瞬态动力学软件LS-DYNA对其进行数值仿真,得到膨胀式吸能构件的吸能特性;然后在该吸能装置上增设导向杆,并研究了壁厚、诱导孔等几何参数对该吸能管碰撞特性的影响;最后结合该型低地板列车做碰撞仿真分析。结果表明,增设导向杆和诱导孔后的吸能防爬装置具有良好的吸能与防爬能力;壁厚能显著影响吸能管的碰撞界面力和吸收的能量,壁厚越大,碰撞界面力和吸收的能量越大。证明该吸能防爬装置符合设计要求,为吸能防爬装置在低地板列车上的合理应用提供理论指导。
To study the energy absorption and anti-climbing properties of the anti-climbing energy absorbing device based on a low-floor vehicles and improve the frontal crashworthiness of car body structure, the numerical simulation was carried out using the nonlinear transient dynamic software LS-DYNA to obtain the energy absorption properties of the expanded energy absorbing component; Then the guide rod was added on the energy absorbing device, and the influence of the geometrical parameters, such as the thickness of the wall and the induced hole on the collision properties of the energy absorbing tube were studied; Finally, combined with the low floor vehicle, the collision simulation analysis was carried out. The results showed that the anti-climbing energy absorbing device with the guide rod and the induced hole has good energy absorption and anti-climbing ability; Wall thickness has a significant influence on the interfacial force and energy absorbed, the larger the wall thickness is, the larger the collision force and absorbed energy are; It is proved that the energy absorbing device can meet the design requirements, and can provide theoretical guidance for the reasonable application of the anti-climbing energy absorbing device on the low-floor vehicle.
To study the energy absorption and anti-climbing properties of the anti-climbing energy absorbing device based on a low-floor vehicles and improve the frontal crashworthiness of car body structure, the numerical simulation was carried out using the nonlinear transient dynamic software LS-DYNA to obtain the energy absorption properties of the expanded energy absorbing component; Then the guide rod was added on the energy absorbing device, and the influence of the geometrical parameters, such as the thickness of the wall and the induced hole on the collision properties of the energy absorbing tube were studied; Finally, combined with the low floor vehicle, the collision simulation analysis was carried out. The results showed that the anti-climbing energy absorbing device with the guide rod and the induced hole has good energy absorption and anti-climbing ability; Wall thickness has a significant influence on the interfacial force and energy absorbed, the larger the wall thickness is, the larger the collision force and absorbed energy are; It is proved that the energy absorbing device can meet the design requirements, and can provide theoretical guidance for the reasonable application of the anti-climbing energy absorbing device on the low-floor vehicle.
引文
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[2]NIA A A,PARSAPOUR M.An investigation on the energy absorption characteristics of multi-cell square tubes[J].ThinWalled Structures,2013,68(10):26-34.
[3]ROSSI A,FAWAZ Z,BEHDINAN K.Numerical simulation of the axial collapse of thin-walled polygonal section tubes[J].ThinWalled Structures,2005,43(10):1646-1661.
[4]丁叁叁,李强,卢毓江,等.防爬吸能装置的碰撞动力学性能[J].西南交通大学学报,2015,50(4):732-739.
[5]邓锐,韦海菊,胡佳乔,等.一种地铁列车吸能防爬装置的开发研究[J].铁道车辆,2014(5):25-28.
[6]杨巨文,唐治,何峰,等.矿用扩径式吸能构件吸能防冲特性研究[J].振动与冲击,2015,34(8):134-138.
[7]雷成,肖守讷,罗世辉.轨道车辆切削式吸能装置吸能特性研究[J].中国机械工程,2013,24(2):263-267.
[8]谢素超,田红旗,姚松.车辆吸能部件的碰撞试验与数值仿真[J].交通运输工程学报,2008,8(3):1-5.
[9]Technical Committee CEN/TC 256.Crashworthiness requirements for rail way vehiclebodies:EN15227-2008[S].London:British Srandard Institution,2008.
[10]邹翔,高广军,董海鹏,等.高速列车多边形多胞吸能管耐撞性分析与优化[J].铁道科学与工程学报,2016,13(7):1386-1392.