某型装甲破障车车体结构强度有限元仿真研究

某型装甲破障车的车体结构在复杂组合载荷作用下，必须同时满足强度和海上浮力储备等技术要求，有限元仿真技术为快速经济地实现这样的设计目标提供了可能。首先建立车体结构的三维实体有限元模型，其中对车体各部件之间复杂的接触条件和部件形状进行简化处理，给出车体结构承受的外挂部件重力、爆破器发射冲击力、发动机离心力和最大输出扭矩等载荷的等效静力学表达，确定车体结构的边界约束条件。仿真计算各种载荷作用下车体结构的变形和应力分布状况，指出车体结构强度和刚度的薄弱部位，分析导致计算的最大应力超过材料屈服强度的原因，提出并仿真验证车体主要承载部件的设计改进方案。

STUDY ON STRUCTURAL PROPERTIES OF AN ARMORED VEHICLE BODY BY FEM SIMULATION

The reliable strength and buoyancy potentials of a special armored vehicle body under complicated load conditions are required simultaneously.In order to achieve this design target,the finite element method(FEM) is a quick and economical approach.In consideration of the simplified contact condition of moving parts and their shapes,the 3D FE-simulation model of the vehicle body structure was established.The displacement boundary conditions and the representation of the weight of functional parts,the emission impact force of an exploder and the engine centrifugal force were discussed.The state of the deformation and the distribution of the stress in the body under different load combinations were computed.The reason leading to the stresses that exceed the material yield limit was analyzed.Based on the results,the strength and stiffness weak positions are discovered,and the modified design schemes are proposed and verified by FE-simulation.