基于ANSYS的弹载记录仪优化设计分析  

The optimization design and analysis of missile-borne recorder based on ANSYS

作　　者：王俊峰[1,2] 祖静[1,2] 尤文斌[1,2] 王伟[1,2] 丁永红[1,2] 窦超[1,2] 

机构地区：[1]中北大学电子测试技术国家重点实验室,太原030051 [2]中北大学仪器科学与动态测试教育部重点实验,太原030051

出　　处：《应用力学学报》2015年第1期163-166,181-182,共4页Chinese Journal of Applied Mechanics

基　　金：山西省青年科技研究基金(2013021015-1)

摘　　要：针对记录仪在高强度、高速撞击挤压等恶劣环境下出现损坏的现象,为了防止弹载记录仪的外壳被挤压变形,对记录仪的机械结构设计进行了优化改进。将记录仪外壳材料由优化前的45#钢更换为高强度钢35Cr Mn Si A,并将靠近内层保护壳的外壳壁厚由8mm增加到17mm,内层核心电路保护壳也采用高强度钢35Cr Mn Si A,壳体内部采用环氧树脂灌封。通过ANSYS/LS-DYNA软件仿真计算,结合高冲击下能量吸收理论分析得出:优化改进前和改进后外壳所能承受的极限强度分别为1.490GPa和4.973GPa;外壳吸收能量与整体吸收能量的比值由58.63%提高到75.52%。由此证明该方案是可行的,能够防止记录仪在配重模块质量为20kg、初速度为200m/s的高强度撞击下出现外壳破损,能够很好地保护记录仪核心模块。本文结果对弹上产品的机械结构设计以及核心电路保护具有一定的参考价值。When the missile-borne landing in the projectile flight test, the outside shell produces actual deformation displacement of 27.62 mm under the external projectile impact extrusion of weight module, which causes the recorded data damaged and can not be recovered. In order to prevent the extrusion displacement of on-board recorder shell, optimization is made to improve the mechanical structure design. High-strength steel 35 Cr Mn Si A is used to replace 45# steel for the recorder shell material, and the wall thickness of protective shell which close to the inner shell is increased from 8mm to 17mm; Inner core circuit protective shell is also made of high-strength steel 35 Cr MnS i A, and shell internal is potted with epoxy. Combined with energy absorption theory under high impact, the simulation analysis is conducted by the ANSYS/LS-DYNA. The result shows that before optimization, the ultimate strength that the shell can withstand is 1.490 GPa and after optimization that is 4.972 GPa. The ratio of the shell energy absorption to the overall energy absorption improves from 58.63% to 75.52%. The scheme is proved to be feasible as it can prevent recorder from being broken up when the clump weight is 20 kg and the initial velocity is 200m/s. It can well protect the recorder core modules. At the same time, it is of high reference value to the mechanical structure design of the elastic fabric and the protection to the core circuit.

关 键 词：弹载记录仪 撞击挤压 存储芯片 机械结构 ANSYS/LS-DYNA 

分 类 号：O346.1[理学—固体力学]