Steer Column Of Automobile And Body Block Impact Research

Automobile safety is one of the three major research topics of continuous developmentof modern automotive industry. Both active and passive safeties of automobile have calledpeople’s attention all over the world. According to statistics of traffic accidents and researchresults on automobile impact tests, we can find that the steering assembly is primarycomponent leads to the driver’s injury in the front impact. The main content of the paper isproposed through the analysis of status and future of the domestic and foreign research aboutdriver impact with energy-absorbing steering assembly, and then the following research starts.Firstly, use the reverse engineering method to create the body block geometry model.Then, design the calibration test of body block and the steering assembly and make the testregulations. Verify the accuracy of the finite element model of the body block, steeringwheel and steering column through the comparison of experiment and simulation results.Secondly, according to GB11557regulations, with energy-absorbing steering column forthe study, use HyperMesh to establish the finite element models of steering column, steeringwheel and the body block. Use Ls-dyna to calculate the impact process, and Hyperview toprocess the analysis results.Finally, make an impact test through the energy-absorbing steering assembly and bodyblock to obtain the time course of the steering column impact force. It is indicated that thesimulation and actual test results are basically consistent via comparing the experimentalresults and the simulation results. Thus the accuracy of the finite element model of the impactand the effectiveness of the simulation method are confirmed. To solve the problem thatenergy-absorbing steering column does not meet the requirements of GB11557regulations,the design is improved based on the impact simulation model and its effect is validatedthrough experiments.