| As China achieves great advance in its military strength and international influence,China’s peacekeeping force and counter-terrorism units are active in international action over the world.Meanwhile,they are also suffering the life-threatening from the mines and IEDs,which is the main attack means of terrorists.Nowadays,studies on occupant protection against bottom blast threat are gaining more and more attention from home and abroad.However,most people paid great efforts to the vehicle’s bottom armor and structure configuration design and ignored the.occupant resistant system design.Therefore,it is very meaningful for the anti-blast occupant protection development and vehicle design to have a further research on the occupant resistant system under the mine explosion.In this paper,a certain type of military vehicle occupant restraint system is treated as the research object,and along with the main purpose of gaining the most protection efficiency against the mine explosion,a method combined by the numerical simulation and vehicle test is adopted to analysis the occupant resistant system protection ability and its promotion possibility.The main research contents are as follows:(1)In the second chapter,mine blast phenomenon is simulated by the CONWEP algorithm and ALE algorithm separately,and the theory of target board response under blast impact is used for testing the validity of blast simulations.And it turns out that CONWEP algorithm can simulate the impact of the mine blast correctly and it is more computational efficiency than ALE method,so CONWEP algorithm is adopted for the follow-up studies.(2)Then,finite element division skills is applied in the modeling effort of the vehicle and occupant resistant system,and the form of mine blast under the vehicle bottom is constructed using CONWEP method.Meanwhile,a vehicle blast test is conducted which is aimed at collecting the acceleration from the structure and dummy’s injury signal.And with the acquired signals,the finite model can be corrected for the further analysis and optimization.(3)In the forth chapter,a study on the parameters of occupant resistant system is conducted for the factors response analysis.In this chapter,seatbelt forms and stiffness,spring stiffness,damping coefficient and spring stoke are included in the discussion,and the purpose of this task is to screen the factors for the subsequent optimization work and find the relationship between the design parameters and occupant injury.(4)Lastly,the optimization task for the occupant protection is laid out by using the screened parameters.The optimization method is accepted as the following task progress:design of experiment,establishment of the mathematics agent model and multi-objective optimization design.According to this solution progress,the neck’s bending moment is obviously decreased and the occupant resistant system has better protection performance. |
