Recognition method of vehicle skeleton collision deformation based on isoparametric transformation

In order to solve the problem of low accuracy of impact force calculation and deformation identification existing in traditional vehicle skeleton collision deformation identification methods, a new vehicle skeleton collision deformation identification method based on isoparametric transformation is proposed in this paper. Firstly, the hexahedral element is selected to carry out isoparametric free transformation. According to the transformation results, the virtual displacement theory in the process of vehicle skeleton collision is constructed without considering the internal damping of the vehicle skeleton, and the collision equilibrium expression is constructed. Based on the analysis of hexahedral elements of automobile frame structure, the elastic-plastic equation of impact deformation is constructed, and the elastic-plastic equation of deformation is solved according to the stress-strain constitutive relation of automobile frame material. Under the yield condition, the impact force is calculated to complete the calculation of deformation parameters. Experimental results show that, compared with the traditional collision deformation parameter recognition method, the proposed method can continuously track the deformation results and get accurate recognition results.