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Simulation and Improvement of Safety Performances of a Certain School Bus


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Simulation and Improvement of Safety Performances of a Certain School Bus
WANG Liang mo 1CHEN Dong yi 1YUAN Liukai2ZHANG Zun zhi 2ZHANG Tang yun 2
1.School of Mechanical Engineering,NUST,Nanjing 210094,China; 2.Nanjing Iveco Automobile Co.,Ltd.,Nanjing 210028,China
school busessafety performancesfinite element analysisrollover protectionroof crush resistance
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,〖HJ1.7mm〗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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Last Update: 2012-12-29