电子回旋共振推力器C/C复合材料栅极的力学性能

为了研究电子回旋共振推力器在搭载火箭升空过程中,过载和振动环境对栅极带来的影响,采用有限元分析软件建立了10 cm C/C复合材料栅极的有限元分析模型,计算分析了不同C/C复合材料栅极的力学性能、频率响应和振动模态。结果表明:20g过载下,栅极的最大变形量为6.12×10-4mm;在5~800 Hz激振下,栅极频率响应的最大位移为2.3×10-6mm;过载对栅极的影响要大于振动对它的影响,但是这两个值都在安全门限内;综合分析栅极频响和模态分析的计算结果,栅极仅在其第一阶模态处于外界激振发生共振。

Mechanical property evaluation of C/C composite material grids for electron cyclotron resonance thruster

To predict influence of the rocket acceleration force and vibration on electron cyclotron resonance thruster when it is being launched to space,a finite element model of 10 cm C/C composite material grid was established with finite element analysis software.Some of its dynamic characteristics,vibration response characteristics and models was analyzed.The results show that when the acceleration was 20 g,C/C composite material grid displacement is less than 6.12×10-4 mm.Its response displacement is 2.3×10-6 mm when the frequency range of exciting force was 5 to 800 Hz.The acceleration force affected on C/C composite material grid was severer than vibration on that,but two of the valuations were within the safe threshold.The C/C composite material grid only vibrated sympathetically on its first mode.