Numerical form-finding method for large mesh reflectors with elastic rim trusses
| Autor: | Yiqun Zhang, Dongwu Yang, Jingli Du, Peng Li |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Cable net
020301 aerospace & aeronautics Offset (computer science) business.industry Aerospace Engineering Truss 02 engineering and technology Structural engineering Large aperture Computer Science::Numerical Analysis 01 natural sciences 010305 fluids & plasmas 0203 mechanical engineering Physics::Space Physics 0103 physical sciences Boundary value problem Elasticity (economics) business Geology |
| Zdroj: | Acta Astronautica. 147:241-250 |
| ISSN: | 0094-5765 |
| Popis: | Traditional methods for designing a mesh reflector usually treat the rim truss as rigid. Due to large aperture, light weight and high accuracy requirements on spaceborne reflectors, the rim truss deformation is indeed not negligible. In order to design a cable net with asymmetric boundaries for the front and rear nets, a cable-net form-finding method is firstly introduced. Then, the form-finding method is embedded into an iterative approach for designing a mesh reflector considering the elasticity of the supporting rim truss. By iterations on form-findings of the cable-net based on the updated boundary conditions due to the rim truss deformation, a mesh reflector with a fairly uniform tension distribution in its equilibrium state could be finally designed. Applications on offset mesh reflectors with both circular and elliptical rim trusses are illustrated. The numerical results show the effectiveness of the proposed approach and that a circular rim truss is more stable than an elliptical rim truss. |
| Databáze: | OpenAIRE |
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