Analysis Of Vehicle 100% Frontal Crash Simulation Based On HyperWorks And LS-DYNA

China's growing economy makes the car ownership is growing,but the number of car crash is also rising.For which the country has developed a relevant car safety crash regulations,the major car manufacturers are also improving the safety of car crash technology to meet the requirements of the national car safety crash regulations,while obtaining a higher NCAP safety crash score.Based on a SUV model,a 100% rigid wall collision simulation model of the vehicle is established.The computer simulation software is used to realize the frontal crash test.The simulation results are used to evaluate the crashworthiness of the vehicle model in the collision.Research provides reliable methods and technical support.The main contents and achievements of this paper are as follows:(1)Pre-processing using HyperMesh software to complete the car collision model of the grid division,the definition of material properties,load application,contact settings,rigid wall establishment,K file output and so on.Using LS-DYNA to complete the vehicle 100%collision simulation calculation work,get d3 plot results file for post-processing platform.(2)Post-processing mainly uses HyperView software platform,the main task is to vehicle collision energy,acceleration and important parts of the deformation and energy absorption simulation analysis,and then get the car model of the performance curve and cloud.The basis for the assessment of the crashworthiness of the vehicle.(3)The stimulation results are reliable,and fit for real crash situations though analyzing the stimulation results.During 100% frontal crash of the rigid wall,the front part of vehicle warped well,as well as bumper,front rail,the front hoardings,which absorbed large energy,the impact on passengers is less.The car body energy,the A pillar buckling,the door frame deformation are all regular.But B pillar maximum acceleration slightly larger,may have a certain impact on the safety of occupants.