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作 者:王良模[1] 陈东益[1] 袁刘凯[2] 张遵智[2] 张汤赟[2]
机构地区:[1]南京理工大学机械工程学院,江苏南京210094 [2]南京依维柯汽车有限公司,江苏南京210028
出 处:《南京理工大学学报》2012年第6期1031-1035,共5页Journal of Nanjing University of Science and Technology
基 金:江苏省产学研前瞻性联合研究项目(BY2009109)
摘 要:为提高专用校车顶部安全性,对某专用校车在翻滚事故中的顶部结构对乘员的保护作用进行了研究。利用Hypermesh与Hypercrash软件建立其车身有限元模型。针对碰撞包含几何非线性、材料非线性和边界非线性的特点,选择并定义了合适的非线性材料和壳单元,进行了焊接及其他连接方式的模拟。利用RADIOSS求解器,进行校车翻滚保护仿真及乘用车顶部抗压强度仿真。结果表明:在翻滚保护仿真中,该车车身结构能承受标准要求的1.5倍整备质量载荷,在顶部抗压强度仿真中,施力板下表面侵入量为46 mm,满足标准要求。参照有关国际标准,对A柱及横梁结构进行改进设计,使单根横梁的最大承载能力达到64 700 N,提高了该车的翻滚保护性能。To improve the roof safety of a certain school bus, the occupant protection performances of a certain school bus roof structure in rollover accidents are studied here. A durability finite element model of the bus is built by using Hypermesh and Hypercrash. As automotive collision contains the characteristics of geometric nonlinearity, material nonlinearity and boundary nonlinearity, the appropriate nonlinear materials and shell elements are selected and defined, and the spots and other connections are simulated. The rollover protection and roof crush resistance simulation are carried out by RADIOSS. The results show that the body structure is able to withstand 1.5 times of the gross vehicle weight of the standard in roll-over protection simulation, and the intrusion distance is 46 mm in roof crush resistance simulation. Both simulation results meet the requirements of standards. Referring to related international advanced standards, the design of A-pillar and crossbeam is improved,the maximum bearing capacity of one single beam reaches 64 700 N, and the roll-over protection performances of the school bus are improved.
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