Research On The Design Of Protective Seat System For A Military Vehicl

With the development of various military weapons,the war environment has become more complex and changeable,and the safety of the occupants has become a major challenge for the design of military vehicles.Protective seats,as the core equipment to ensure occupant safety,are now gradually applied to military vehicles.The same protective seat is assembled to military vehicles with different mobility and survivability requirements,limiting the seat to play its maximum protective performance.Therefore,it is of great application military value to design more suitable protective seats for military vehicles of different structures to improve their protection performance during combat and better protect the safety of the occupants.In this paper,a new type of energy isolation cushion seat is designed for a certain type of military vehicle,and its protective performance is studied.The protection requirements of the vehicle and occupants are analyzed,finite element structural simulation is applied,combined with the bottom blast test and seat drop test of this type of military vehicle,and multi-objective parameter optimization analysis of the energy isolation cushion device is carried out,in order to maximize the protection performance and ensure occupant safety.First,the transmission path of shock waves during conventional bottom blast is studied,the sources of occupant damage in military vehicles under bottom blast environment are analyzed,and occupant damage evaluation criteria are introduced.Secondly,the military vehicle and occupant protection requirements are analyzed,and after determining the structural dimensions and installation form of the protective seat,the skeleton,energy isolation buffer and safety device of the protective seat are designed,and the overall human-computer ring analysis of the seat is carried out.Then,the FEM simulation software was used to establish the model of the seat-occupant restraint system,and the accuracy of the seat protection performance and simulation model were verified through the high drop test.Based on the seat model and the acceleration data of the seat mounting point collected from the blast testing of the bottom of the military vehicle,the seat protection performance is analyzed in depth.Finally,the energy isolation buffer of the protective seat is optimized by multi-objective parameter optimization,and the results are verified.The results show that the optimized structural parameters can further improve the overall protection performance of the protective seat.