摘要
由于引信可利用空间有限,MEMS安全保险机构从试验到设计过程都非常复杂.为了确保安全机构各个功能件能够可靠作用,提出了一种利用Ansys有限元软件对安全机构中重要部件微弹簧的分析试验的方法.通过动态特性仿真试验,对微弹簧的形变特性和过载等衡量可靠性的指标进行了分析研究,模拟了冲击及振动载荷的失效环境,借助加速应力试验激发微弹簧失效的出现,得到了失效环境下应力及位移的相互关系;实现了对MEMS微弹簧典型的失效模式及其失效机理的分析研究.试验计算得到的弹性系数为193 N/m,与理论值之间的平均相对误差为5.02%,精度较高,为引信MEMS弹簧进一步的优化设计和可靠性研究提供了理论支撑.
The design and experiment of MEMS the safety and arming （S＆A） device are complex because of the small space in the fuze. Based on Ansys simulation software, a new method was employed for the reliability analysis of key component in S＆A device. Working principle of the MEMS S＆A device was described first, the deformation characteristic and overload factor were studied via dynamic simulation test, the fatigue environment was simulated when shock and vibration were loaded, the relationship between the stress and displacement was discussed through accelerated stress experiment; a typical MEMS micro - spring failure mode was reproduced and the failure mechanism was analyzed, finally the experimental results illustrate that the elastic coefficient is 193 N/m, and the relative measurement error is 5.02 %, which is in high accuracy. The conclusions provide theoretical evidence for the design and reliability of the MEMS spring for deep research.
出处
《中北大学学报（自然科学版）》
CAS
北大核心
2014年第2期106-110,共5页
Journal of North University of China(Natural Science Edition)
