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Simulation of Dynamical Properties in Launch Environment of Carbon Fiber Composite Grid of LIPS-100 Ion Thruster Optics
Pages: 891-897
Year: Issue:  8
Journal: Vacuum Science and Technology

Keyword:  Ion thrusterGridDynamics analysisRandom vibrationShock;
Abstract: The dynamical behavior of the carbon-fiber composites grid,of LIPS-100 ion thruster optics in the launch environment( 8. 6grms random vibration and 800 g shock-load),was mathematically modeled,theoretically analyzed and numerically simulated in finite element method with software ABAQUS for the purpose of design optimization. The impact of the elastic modulus of the two laminated carbon-fiber grids and one Mo-grid on the stress distribution and deformation was investigated. The simulated results show that the carbon-fiber composite grids outperform Mo-grid because of higher safety-factor,narrower grid-gap and 10. 72% stronger maximum-thrust; and that the grid deformation depends strongly on the shock-load but weakly on the random vibration. A 31. 16% increase in the elastic modulus of carbon-fiber grid decreases the shock-load induced deformation by 13. 17%. The influence of the electrostatic attraction on the grid deformation remains to be studied.
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