Research On Key Technologies Of Manned Airdrop Vehicle Seats

As an effective battlefield attack mode,airborne operations are highly valued by the military.The integrated airdrop technology of man and vehicle is the key and difficult point to improve the effectiveness of airborne combat,but it becomes possible with the development of safety technology for the occupants in the vehicle.The key technology of the passenger seat is of great significance to ensure the safety of the occupant and the continuous combat capability by studying the mechanism of cushioning and protection of personnel at the moment of vehicle landing,and to ensure the implementation of the project.In addition,the research results of this article can also be applied to the aircraft crash Security and other fields.This paper takes a light vehicle as the research object,analyzes the dynamic response of the vehicle body and the occupant under the landing conditions through a real vehicle drop test,and establishes a vehicle-seat-occupant simulation model in an airdrop environment.Through accurate model simulation,theoretical analysis and multi-objective optimization algorithm,the relevant seat technology that affects occupant protection is designed and researched,and finally meets the occupant protection requirements under extreme impact conditions.The main content and conclusions are as follows:(1)According to the experiment,the accuracy of the established vehicle manned airdrop model is verified.Through the exploration of the landing speed,it is concluded that vehicle itself cannot meet the requirements of the vehicle body and occupant protection at the airdrop speed.The simulation model of the buffer platform and extreme landing conditions of the car body are obtained according to the national military standards.(2)Aiming at the objectives of occupant protection in manned airdrops,this paper summarizes and proposes the evaluation method of occupant safety protection in this paper.The lower limb restraint system was designed to meet the requirements of the occupant's posture adjustment in the airdrop and the effect of its occupant protection was demonstrated.On this basis,the effects of different posture angles of the occupants,calf angles and related parameters of the restraint system on occupant injuries are analyzed.Through parameter sensitivity analysis,it is concluded that the occupant's posture angle and the restraint system's pre-tightening force have a greater impact on the protection effect of the occupant.(3)Introduced the mathematical description of the effect of landing impact on the occupant-seat system.The working characteristics and energy absorption effects of different seat energy absorbers in landing impact are studied.A cushioning airbag at the bottom of the seat was designed to demonstrate the protective effect of the airbag cushioning structure that can make full use of a certain cushioning stroke and matched with the energy absorber.(4)Through the proxy model and the multi-objective optimization algorithm,the optimal solution of the occupant's posture angle,restraint system pre-tightening force,energy absorber platform force and airbag design parameters for occupant injury was obtained,and the reliability of the optimization results was carried out.verification.Under the optimal solution combination scheme,the protection performance of the seat system is improved,so that the occupants can meet the airdrop protection requirements under the extreme landing conditions of the vehicle.