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.