活塞式微作动器结构设计与仿真

Structural Design and Numerical Simulation on the Piston Micro-actuator

为满足小口径弹药引信安全系统用微作动器结构和性能要求,利用ANSYS/LS-DYNA动力学有限元软件模拟分析了活塞式作动器的结构,研究了结构形式和尺寸参数对其性能的影响,并设计改进一种活塞式作功器,测试了不同结构参数的止推力和止退力,得到了不同装药量下活塞式微作动器的输出推力与推程的关系曲线和表达式。结果表明,台阶高度为0.03 mm时,止推力为142 N,止退力为38.5 N;推程为2.0 mm时,最小推力不小于20 N。试验结果与模拟结果比较吻合,偏差在15%以内,说明该数值方法可用于微作动器作用过程研究。

In order to meet the piston micro-actuator used in the small-caliber Ammunition Fuze Safety System structural and func-tional requirements,ANSYS /LS-DYNA finite element software was applied to analyze the structure design of the piston micro-actu-ator,and the structure and size parameters which affect its performance were determined. The anti-thrust force and setback force of different structural size parameters piston micro-actuators was obtained through the piston micro-actuator performance experi-mental test. With step height of 0. 03 mm,anti-thrust force is 142 N,and the setback force was 38. 5 N. The fitting curve and ex-pression of the piston micro-actuator and thrust distance were got under different charges. With thrust distance of 2. 0 mm,the minimum thrust is greater than 20 N. Results show that the deviation of the numerical simulation results with experiment values with 15% ,indicating that the numerical simulation method can be applied to research micro-actuator function process.