Passive Safety Analysis And Verification On Lightweight Commercial Vehicle Cab

With the continuous development of our country’s modernization, vehicle isbecoming more and more popular as a modern traffic tool. The increasing car notonly bring great convenience to people’s life and production, but also the number oftraffic accidents and casualties have been increasing in recent years. Commercialvehicle occupies a large part of the proportion in the whole car sales and causedtraffic accident more serious, reducing occupant casualties, minimize economiclosses, which put forward higher requirements for passive safety performance ofcommercial vehicle cab, this paper systematically studies the commercial vehiclecrash simulation of the commercial cab passive security simulation method.Commercial vehicle cab is the most important vehicle part to protect the driverand passenger’s safety. Studying lightweight commercial vehicle cab’s passivesafety is of great significance. This paper combines the major projects of theDepartment of Science and Technology of Jilin Province " cab lightweightdevelopment and application ", This paper first introduces the automobile crashpassive safety study using two methods: First, the real vehicle test methods, thesecond is computer virtual simulation method and describes the advantages anddisadvantages of the two methods; and then on the base of the original cab sheetmetal stamping structure,carrying out lightweight to the cab according to the thinningprogram in the finite element pre-processing software Hypermesh and analyse thelightweight cab in the state operating conditions of bending, torsion and free modestrength, stiffness and modal analysis results show that the lightweight cab and theoriginal structure have the same statics and vibration characteristics; throughreasonable simplification of the cab structure and the discrete model, the differentstructure to select the appropriate element type, contact type and solder connections,set the parameters of the nonlinear material properties to establish a lightweightcommercial vehicle cab virtual crash simulation model, according to ECE R29occupant protection laws, impose corresponding constraints and load the specified position, set the simulation time, and finally the paper makes use of LS-DYNAanalysing the lightweight cab’s passive safety with a virtual crash simulation analysis,and the simulation results were compared with real vehicle test results.The results show that maximum deformation of the lightweight cab can besatisfied the dummy living space, and meet the ECE R29passive safetylegislation.The mass of the lightweight cab is267kg and have63kg weight loss andweight loss by19%compared to the original cab. The result of this paper accuratelyand efficiently provides a reference to improve simulation accuracy for buildingcommercial vehicle crash simulation analysis model in the future...