A Study On The Virtual Test Technique Of Automobile Side Impact

With the increasing of automobile amount, traffic accident has become a serious problem in the world. The number that the whole world annually died in the road traffic accident estimates to exceed 50 myriad peoples, road traffic accident give the life and property safety of mankind bring serious of disaster. So the research of automobile passive safety technique has already become an austere lesson of nowadays world car technology research. The statistic data of traffic accident in the last ten years indicated that traffic accident caused by side impact is higher than front impact, the death rate caused by side impact is only next to front impact, but the harmful rate caused by side impact is the highest in the all impact accident. So our government has brought the constituting of side impact protection law and regulation into fifteenth programming. Automobile side impact protection regulation is being constituted and will be put into practice soon.In early period automobile side impact safety research repeat test primarily is adopted, automobile structural crashworthiness, occupant restraint system and performance test depend on experiment and experience, this demand a very long research period, it also demand a lot of manpower , material resources and the financial power, even if such, the result that repeat test got is also uncertain ideal. With the modern science technique developed deeply, appearance of a passel of advanced automobile virtual testing soft offer nicer foundation for research of automobile side impact passive safety. Main advantage of virtual testing is: in the design stage of automobile product we can imitate and analyze automobile product, And we can expediently actualize the analysis and research of impact form which real car experiment can not implement, completely find and solve the problem, shorten developing period and reduce research expenses. Because automobile side impact test is in the theory research phases in our country, automobile side impact protection regulation is being constituted, it is not mature to actualize automobile side impact test cosmically. Focusing on this case, the topic study virtual testing for automobile side impact, I hope our research can offer reference for establishment of our country's automobile side impact.Nonlinear dynamic finite element theory is applied in this article, we use VPG (Virtual Proving Ground) software to simulate real car side impact, establish finite element model of full vehicle, side impact movable deformable barrier (MDB) andside crash dummy, and then we set and control simulation process parameter in automobile side impact virtual test, finally actualize automobile side impact virtual test. The results in the virtual test are compared with those in the experiments, the results of virtual test agreed approximately with the real side impact test. At the same time virtual test validated the article automobile side impact virtual test simulation method, testified the accuracy of automobile side impact virtual test simulation model. The research result of this article will play an important role in the constituting of Chinese full-scale vehicle side crash law and regulation.