Simulation On The Front Impact Of Vehicle Based On LS-DYNA

In recent years, with the rapid development of our economy, the automobile industry was developed rapidly. more and more cars appeared in major cities and towns, with more traffic accidents happened, causing heavy casualties and huge economic losses. thus study automotive passive safety has great social value and economic significance, because of causing greater damage to the occupants frontal vehicle crash. To carry out the security of front crash studies have become an important issue of vehicle passive safety.In this paper, a detailed description of the finite element basic theory for the crash of the car, including contact algorithm and time step, hourglass, control parameters, which provides a theoretical basis for the establishment of the finite element model. The vehicle mesh were established by the shell elements, three-dimensional solid elements, beam elements, according to simulation analysis of front crash between the car and rigid wall. Giving the right elements type for each component, choosing the appropriate means of contact, setting up the rigid wall. The front crash finite element model was developed which is universal to reflect the structural characteristics of the vehicle parts, and helping to providing a reference for analysis the simulating results.In this paper, the front crash between the car and rigid wall was developed according to our national central collision approach-CMVDR294. The overall deformation acceleration of the car was analyzed, and the deformation of the main energy absorption components were also analyzed, the crashworthiness for front crash was appraised according to the result of simulation.The modeling methods and assessment process, which has an important significance and value for research on structural crashworthiness of automotive products in engineering.