Vehicle body structure finite element analysis method and device and medium

The invention discloses a vehicle body structure finite element analysis method and device and a medium. Relates to the field of vehicle design, and solves the problem of low efficiency caused by manual establishment of a finite element model of an aluminum alloy vehicle body when finite element analysis is carried out on a vehicle body structure every time. According to the method, the closed shell is identified through the geometric attribute information of the STP file so as to determine the section profile, the two-dimensional section of the vehicle body is extracted through the three-dimensional geometric information of the section profile, the finite element model of the vehicle body is further generated, and in the process, only geometric attribute information screening conditions and closed shell screening conditions need to be preset, so that the finite element model of the vehicle body is obtained. The method can automatically complete the extraction of the information meeting the conditions, does n