Research On The Safety Protection Technology Of The Occupant Space In The Vehicle Under The Explosive Impact Environment

How to maximize the protection of occupants and reduce the risk of occupant injury when military vehicles encounter a mine explosion is the focus of vehicle protection research in recent years.However,previous protection methods have focused on the damage values of various parts of the occupant’s body after the end of the explosion.Few people pay attention to the movement of the occupants in the vehicle during the explosion,neglecting the secondary damage caused by the collision between the limb and the vehicle’s body.With the changes in the battlefield situation,the improvised explosive device poses a greater threat to vehicles and occupants.Therefore,the occupant space safety should be improved as much as possible without minimizing the vehicle mobility.It is of great significance.In this paper,a light wheeled tactical vehicle is taken as the research object.The finite element simulation analysis and experimental research are combined to study the limb motion response and damage degree of the occupants in the explosion environment of the vehicle,and the concept of occupant space safety in an explosive environment is proposed.The space safety of the occupant is improved by improving the occupant restraint system and increasing the protective structure.The main work and conclusions are as follows:Firstly,by studying the definition method and evaluation method of the occupant’s living space in passenger cars and commercial vehicles in collision,according to the limb movement characteristics of the occupants in the light tactical vehicle under the impact of explosion,combined with the previous research on human biomechanics,an evaluation method for the safety of occupants in the blast environment is proposed.Then the finite element modeling of the vehicle body was carried out.The finite element analysis method was used to analyze the vehicle body and occupant response under the impact of 6kg mine explosion.It was found that the space safety of the occupants in the car does not meet the requirements when the 6kg mine exploded at the bottom of the vehicle.Then,the occupant restraint system was improved and a new structure that can effectively reduce the lower limb damage of the occupant was proposed.After adopting the improved scheme,the occupants in the vehicle have sufficient living space and will not collide with the vehicle body,the biomechanical response value of each part of the occupant is also lower than the human body tolerance limit,and the space safety of the occupant in the vehicle is significantly improved and able to fulfill requirements.Finally,the experimental research method is used to verify that the improvement scheme for this vehicle is effective.Under the premise of ensuring that the weight of the whole vehicle is not greatly increased,this paper proposes a protective measure that can effectively protect the occupants in the vehicle,and has certain practical significance for the protection of the light wheeled tactical vehicle.