泡沫铝夹芯结构装甲车底板设计与性能分析

Design and performance analysis of armored vehicle floor with foam aluminum sandwich structure

为提高装甲车越野机动性、安全防护和乘坐舒适性,取某U型截面装甲车底板为原型,设计泡沫铝夹芯底板,简化理想空气中地雷爆炸冲击波曲线,得到用于装甲车底板爆炸冲击仿真等效压力波数学模型,用多目标优化设计优化泡沫铝夹芯底板,用ANSYS有限元仿真软件,对原型结构和优化后泡沫铝夹芯底板在地雷爆炸载荷作用下的变形、应变、应力、吸能性及地雷爆炸产生的噪声车内声场强度仿真,进行对比分析。结果表明:相较于原型底板,泡沫铝夹芯底板的最大变形、应变、应力、声场强度、质量均有不同程度降低,吸能总量显著提高。证明泡沫铝夹芯底板对增强装甲车越野机动性、安全防护性和乘坐舒适性有效。

In order to improve the off-road mobility,safety protection and ride comfort of armored vehicles,a U-shaped cross-section armored vehicle floor was selected as a prototype to design a foam aluminum sandwich structure floor to simplify the shock wave curve of landmine explosion in ideal air. The equivalent pressure wave mathematical model used to study the explosion impact simulation analysis of the armored vehicle floor was obtained. At the same time,the multi-objective optimization design theory was used to optimize the foam aluminum sandwich structure floor. The ANSYS finite element simulation software was used to analyze the prototype structure and the optimized foam. The deformation,strain,stress,energy absorption of the aluminum sandwich structure bottom plate under the action of the explosion load of the mine and the sound field intensity in the vehicle under the action of the noise generated by the explosion of the mine were simulated,and the results were compared and analyzed. The results show that compared with the prototype bottom plate,the maximum deformation,maximum strain,maximum stress,sound field intensity,and quality of the foam aluminum sandwich structure bottom plate reduce to varying degrees,but the total energy absorption significantly increases. It proves the effectiveness of the foam aluminum sandwich structure floor for enhancing the cross-country mobility,safety protection and riding comfort of armored vehicles.