Seat Simulation

As an important connection between occupants and the vehicle, automotive seats play a particularly important role in occupant safety. Reasonable seat structural design can ensure that the seat meets certain strength requirements under complex load conditions, absorbs more collision energy while ensuring functions do not fail, and effectively reduces the degree of occupant injury during collisions.

Based on the seat of a certain brand of automobile, finite element simulation analysis methods are used to study its safety performance. The main work is as follows: First, the CAD digital model of the seat is discretized, and components such as the frame, height adjuster, and slide rails are carefully meshed to obtain a detailed structural model. The materials and properties of each component are determined according to real material characteristics, and reasonable connection methods are selected to ensure simulation accuracy.

Second, HyperMesh and Primer are used as pre-processors, LS-DYNA, Nastran, and Abaqus as solvers, and HyperView as the post-processor. According to the test conditions specified in domestic regulations GB 15083-2006, GB 11550-2009, and GB 14167-2006, as well as the 2021 version of China New Car Assessment Program (C-NCAP), relevant parameters are set and corresponding boundary conditions are defined. Simulation models are established for the modal test, headrest energy absorption test, seat back static strength test, seat static strength test, seat inertia resistance test, seat belt anchorage strength test, ISOFIX anchorage strength test, luggage impact test, and whiplash test.