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Design of a Composite Structure of a Cube Satellite from the Aspect of Heat Transfer and Distribution And Thermal Stresses in GEO Orbit using Genetic Algorithm

Azarmi Falahati, Sahand | 2024

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 58081 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Abedian, Ali
  7. Abstract:
  8. This project aims to design and optimize the structure of a thermal observation cubesat utilizing a multi-component carbon-silicon carbide matrix composite material with a 40% volume fraction for both the frame and panels. The employment of this material results in a 23% weight reduction compared to aluminum, which can be utilized to enhance the satellite's payload capacity. The target orbit for the satellite is GEO, which is approximately 36,000 kilometers from Earth. These satellites are positioned in the sky such that their orbital period matches the Earth's rotation, causing them to revolve around the Earth once every 24 hours, effectively making them appear stationary from a specific vantage point. The thermal loads acting on the satellite include: 1) solar thermal flux, 2) albedo thermal flux, and 3) Earth infrared thermal flux. The thermal flux on each composite panel is calculated based on the satellite's trajectory and applied as boundary conditions. Subsequently, two satellite models, one without a frame and one with a frame, are designed using the finite element software ABAQUS. Ultimately, the framed model proves capable of satisfying the problem's constraints. Finally, the designed structure is optimized using a genetic algorithm, a metaheuristic optimization technique, in terms of fiber orientation, achieving a 48.18% improvement compared to the unframed model and a 6.13% improvement compared to the initial framed model
  9. Keywords:
  10. Radiative Heat Transfer ; Thermal Stress ; Finite Element Analysis ; Geostationary Orbit Satellites (GEO)Satellites ; Genetic Algorithm ; Composite Structures ; Cubesat

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