| With the extensive use of armored vehicles in modern wars and anti-terrorism peacekeeping operations,the anti explosion and impact protection capabilities of mobile vehicles such as military vehicles and police cars are attracting increasing attention.The research on the protection capability of the occupant restraint system is still in the primary stage.Therefore,the research on the crew restraint system based on the bottom protection is of great significance to the protection of the crew in the explosive environment.In this paper,the occupant restraint system of a light armoured vehicle is taken as the research object.Under the blast environment at the bottom of the vehicle,the aim is to improve the protection capability of the occupant restraint system.Through the combination of the whole vehicle bottom protection test and the whole vehicle bottom explosion finite element simulation,the key technology of the occupant restraint system in the vehicle is studied.The main contents and conclusions are as follows.(1)The whole vehicle and the occupant restraint system finite element model are established.The seat structure and dummy response signal is obtained through simulation calculation.’Then the response signal obtained is compared with the corresponding signal collected by vehicle bottom explosion test.Finally,the verification of the finite element model are completed.(2)The installation method is one of the key technologies for the occupant restraint system.The influence of the installation mode of the occupant restraint system on the protection capability of the occupant restraint system is studied.By comparing and analyzing the influence of the different installation methods on the seat structure and the false person’s response,the optimal installation method of the occupant restraint system is determined.(3)The design of energy-absorbing elements is the key technology to determine the protective performance of occupant restraint system,By designing the structure size and starting load of the energy absorbing element,and Simulation of dynamic simulation of energy absorption components.Complete the design of suction turnup pipe elements.Finally,according to the simulation results of seat and dummy response,the cushioning effect of different energy absorption components is compared,and the protection performance of the occupant restraint system is further improved.(4)The multiobjective genetic algorithm is used to optimize the design of the occupant constraint system.Through experimental design,agent model establishment and multi-objective optimization design process,the relevant parameters of occupant restraint system are optimized.The optimization results improved the protection performance of the occupant restraint system. |
