Research On The Design Of Vehicle Protective Seat Structure And Key Components

The technology of modern war weapons and equipment is developing rapidly,and the demand for protective vehicles is increasing.In order to deal with the problem that mines and improvised explosive devices threaten the lives of passengers,the research of protective seat structure and key energy absorbers is of great significance to protect the safety of passengers.This paper takes the driver's seat and energy absorber of the cockpit of a certain type of vehicle as the research object,and establishes a finite element model of the cockpit and a local model of the protective seat.The factors that affect the protective performance of the seat are researched through an accurate analysis model.Theoretical analysis of the energy absorber and multi-objective parameter optimization are performed to ultimately reduce the risk of occupant injury.The main contents and conclusions are as follows:(1)According to the transmission path of the IED shock wave in the explosion environment at the bottom,the source of the occupant's damage were studied,and the occupant's damage tolerance limit was discussed.Based on the ALE-FSI explosion simulation algorithm,a finite element modular modeling is performed for a certain type of vehicle,and the verification with the actual explosion test of the real vehicle is completed.A accurate local seat model is established to eliminate the influence of variables of other transmission paths.(2)Analyze the protective performance of different seat installation methods,seat structures and different energy absorbers.The seat structure methods and metal plate VLEA used in real vehicles have been studied to effectively reduce the occupant damage.(3)The energy absorption value is obtained through the theoretical analysis of metal bending,and the limit of the starting load is discussed.Design test to get the accurate energy absorber load-displacement curve.Analyzing the impact of different starting loads on occupant damage,it was found that making full use of the vehicle body space,appropriately reducing the starting load of the energy absorber can reduce occupant damage.(4)Though the optimal Latin hypercube test design,construct the Kriging agent model,and the multi-objective genetic algorithm to finally obtain the optimal solution of energy absorber structure parameter,improve the protective performance of the protective seat system,and the reliability of optimization results is verified.