Mechanical simulation of artificial gravity in torus-shaped and cylindrical spacecraft

DASTJERDI S., MALIKAN M., EREMEYEV V. A., AKGÖZ B., Civalek O.

ACTA ASTRONAUTICA, cilt.179, ss.330-344, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 179
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.actaastro.2020.11.005
  • Dergi Adı: ACTA ASTRONAUTICA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, INSPEC, Metadex, Public Affairs Index, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.330-344
  • Anahtar Kelimeler: Torus-shaped and cylindrical space structures, Artificial gravity, First-order shear deformation theory (FSDT), Functionally graded materials, VIBRATION ANALYSIS, INSTABILITY
  • Akdeniz Üniversitesi Adresli: Evet

Özet

Large deformations and stress analyses in two types of space structures that are intended for people to live in space have been studied in this research. The structure under analysis is assumed to rotate around the central axis to create artificial gravitational acceleration equal to the gravity on the Earth's surface. The analysis is fully dynamic, which is formulated based on the energy method by using the first-order shear deformation shell theory in two systems, cylindrical and torus. Also, the nonlinear von Karmen strain field has been assumed. The obtained set of partial differential equations has been solved using the semi-analytical polynomial solution method (SAPM). The main purpose of this paper is to study the effects of unusual conditions in the space outside the Earth's atmosphere (which is a complete vacuum environment without pressure) on the strength of the analyzed structure. The numerical results of the governing equations have been evaluated using those of other studies and the simulation efficiency performed in this research has been proven. Finally, the effect of important parameters on the numerical results, including the angular velocity of the structure (which causes artificial gravity), the amount of imposed mechanical and hygm-thermal loads, the structure size and material specifications have been investigated in more detail.