Yazarlar

• Basturk, S(1)
• Gul, Rustem(1)
• Ilarslan, M(1)
• Ince, F(1)
• Kaplan, Erdar(1)
• Karakaya, Sukru(1)
• Kaynak, O(1)
• Soykasap, Omer(1)
• Uysal, Habib(1)
• Uzman, Umit(1)

• BildiriYalnız künye2013/r/gumushane/15366
  Self-deploying composite shell reflector antenna for Ku-band missions: 1.5 m diameter demonstrator

  Soykasap, Omer; Karakaya, Sukru; Kaplan, Erdar; Ilarslan, M; Ince, F; Kaynak, O; Basturk, S

  Carbon fiber reinforced plastic (CFRP) composite shell reflectors have been developed for space borne antennas due to their light weight, high thermal stability, and high surface accuracy. In order to reduce launch cost and structural mass, compactly folding and self-deployment of the reflector is preferred. In this paper, the full-scale offset reflector with a diameter of 6 m was designed by introducing reinforcements in the central region. After modal analysis was carried out for full-scale reflector model, the suitability of design was determined and 1/4-scaled version was manufactured. The experiments of the demonstrator were conducted for modal analysis, folding, dynamic deployment behavior and surface accuracy. As a result of study, new reflector model was successfully designed with low-mass, manufacturing ease, lower cost and has a monolithic structure, which two opposite edges of the reflector can be rolled toward the center of the reflector for packaging.

  AtıfScopus4·WoS3

  İncele
• MakaleYalnız künye2007Scopus SJRQ1/r/gumushane/14790
  Optimum shape design of shell structures

  Uysal, Habib; Gul, Rustem; Uzman, Umit

  A finite element-based shape optimization program has been developed for three-dimensional shell structures and the shape optimization of shell structures has been performed. The shape optimization program is implemented by a job control language and a reliable finite element package program, ANSYS, is used for structural analysis. To achieve the shape optimization, different principles such as structural analysis, automatic mesh generation, sensitivity analysis and mathematical programming are inter-related. The objective is to minimize the weight of the shell structure under constraints that are the maximum value of the von Mises stress in each element and the move limit for each design variable. The design sensitivities are calculated using the finite difference method. The search for the final shape of a structure is performed using the linear programming technique. Several examples are provided.

  AtıfScopus33·WoS29·OpenAlex36

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