Research On Side Blast Protection Technology Of A Certain Type Of Armored Vehicle

In the current local asymmetric warfare mode,with the rapid development of landmines and improvised explosive devices,the safety of vehicles and occupants is becoming more and more threatened,especially under the impact of side explosions on vehicles,because the side armor of vehicle is weak and occupant safety space is small,its body structure is easily damaged,and the occupant safety is seriously threatened.Aiming at the problems of military vehicle damage and occupant injury,it is of great significance to carry out research on vehicle protection in a side explosion environment.This article takes a certain type of armored vehicle as the research object,and combines the theoretical analysis,experimental research and numerical simulation to study the vehicle's impact resistance and occupant safety in a side explosion environment.The main methods are as follows:Firstly,the characteristics of various explosion simulation algorithms are studied.In order to balance the simulation calculation efficiency and the accuracy of the results,a suitable LBE explosion simulation algorithm is selected in combination with the side explosion boundary.Based on this,the air parameter pairing is studied by a combination of theory and simulation.The influence of the calculation accuracy is based on the theoretical calculation value of the central deflection of the constrained square target structure.The relationship between the air thickness,the air grid size,the target deflection and the calculation time is analyzed to obtain the best air parameters.Then,the finite element model of the vehicle is established by a modular method.The dynamic response of the vehicle and the occupant in the explosive environment at the bottom is compared by means of simulation analysis and experimental testing,which verifies the accuracy of the finite element model.Based on this analysis,the vehicle response in different side explosion conditions is compared and analyzed,and the side explosion boundary is determined.At the same time,the vehicle damage and occupant damage of the vehicle in the side explosion environment are studied,and the unreasonable parts of the vehicle are found.The improved design improves the protection of the original vehicle and reduces occupant damage.Finally,the reliability optimization method is used to optimize the reliability of the improved body structure and restraint system to obtain reliable and optimal design parameters,which further improves the vehicle's protection,also achieves the requirements of vehicle weight reduction.The research results show that after the improvement and optimization,the vehicle body structure has not suffered serious damage,the side structure acceleration,speed and invasion have been significantly reduced,and the damage of key occupants has been reduced,all within the safety threshold,and the vehicle's protective performance and occupant safety have been improved.Therefore,the research methods,technical methods and research results of this paper have certain guiding significance in improving the vehicle's anti-side-blast protection capability and light weight,and provide some ideas and technical support for the optimization design and lightweight research of armored vehicle protection.