基于ANSYS的弹射座椅联锁锁臂的变形分析及改进措施

The Deformation Analysis and Improvement of the Lock Arm of Ejection Seat Based on ANSYS

从弹射座椅联锁装置的工作原理及其各组成机构工作顺序入手,分析联锁装置的打火机构提前工作的原因,建立联锁装置中的关键零件锁臂的有限元分析模型。通过仿真分析,明确了锁臂上的最大变形量出现的部位,并找到了锁臂上强度薄弱的危险部位,提出了在保留原联锁装置的各组成不变的前提下的锁臂结构尺寸改进方案,对改进后的锁臂进行变形及应力分析。结果表明,锁臂端部的最大变形量较改进前有所减小,强度薄弱部位的应力明显降低,验证了文中提出的改进方案的有效性,为联锁装置关键零部件的优化设计提供参考。

Starting from the operating principle of interlock device on the ejection seat and the working order of its agencies, we analyzed the reasons why ignition institution worked in advance, and established the finite element analysis model of the key component-lock arm in the interlock device. Through the simulation analysis, we found clearly the maximum deformation site of the lock arm, the risk strength parts of the lock arm, and proposed the modification program of the lock arm in the structure size, and finished the deformation and stress analysis of the modified lock arm. The results showed that the end maximum deformation of the lock arm was reduced, and the stress intensity of the weak parts was significantly lower than before, which verified the effectiveness of the modifi- cation program. The study provides a reference for the optimal design of key components on the interlock device.