Research Of Lightweight Tracked Armored Vehicle Body Based On Anti-penetration

The running-safety performance and defense capability of the tracked-mounted fighting vehicle are always the research priorities in the military i ndustry.The investigation on the lightweight and anti-bullet performance of the tracked-mounted fighting vehicle body is of great significance for improving the maneuverability of the tank,guaranteeing the safety of soldiers,and ensuring the combat powe r of our country.At present,the research on the lightweight and protective ability of the Tracked combat vehicle body is mainly divided into two directions.Aiming at the body lightweight,the body structure is statically and dynamically analyzed for the body rigidity and modal.Then the body structure is optimized according to the analysis results.Aiming at the protection,the anti-penetration performance of the armor plate’s material composition,structure setting,etc.are studied.In general,there are more studies on these two types.However,under the premise of ensuring the rigidity and strength,the research and optimization of the lightweight and anti-penetration performance of the tracked-mounted fighting vehicle body still needs further discussion.In this paper,the stiffness analysis and anti-bullet performance of a variety of different thickness combinations of the body are carried out.Approximate models and numerical optimization are used to simultaneously optimize the weight and anti-elastic performance of the tracked-mounted fighting vehicle body.The overall static performance and the anti-impact ability of the body is discussed after the optimization of the thickness.The main research contents are as follows:First,according to the drawings provided by the project and the actual combat situation and demanded analysis of the fighting vehicle,the three-dimensional modeling and model simplification of the tracked armored vehicle body are carried out through the software of CATIA.Use the software of HyperMesh to build a FEM of the tracked-mounted fighting vehicle body.Secondly,based on the finite element model,the stiffness of the vehicle body under seven extreme conditions for driving safety and shooting safety is analyzed,and the corresponding stress and displacement cloud diagrams are obtained.In order to make the body of the tracked fighting vehicle realize the lightweight and protection,the body material armor steel was replaced by the composite armor plate developed by the research group: ceramic + UHMWPE + aluminum alloy.The thickness of each material of the armor plate was combined to give the body,and the stiffness of the tracked fighting vehicle body with different material thicknesses is analyzed.Thirdly,In order to meet the requirements for the protection of the tracked-mounted fighting vehicle body,the finite element model of the armor plate of the crawler tank body was carried out.Based on the finite element model,the thickness of the single layer plate of the middl e layer UHMWPE was studied(the number of layers)on its anti-penetration performance.Finally,the different thickness combinations of the various materials of the armor plate are carried out and their anti-bullet properties are analyzed.Fourthly,according to the analysis of the rigidity and anti-penetration performance of the body armor plate in the first two chapters,it can be known that the changes in the thickness of the body armor plate material of the tracked fighting vehicle body will affect the rigidity and anti-penetration performance.Therefore,the thickness of the body material is used as the design variable.After testing and verifying the required sample points,a response surface model was established to optimize the weight,stiffness,and anti-penetration performance of the fighting vehicle body,and to verify the optimized effect.