The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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Structural Analysis of SLGT Platform

  • Kang, Gungwon (Korea Institute of Science and Technology Information) ;
  • Ahn, Sang-Hyeon (Korea Astronomy & Space Science Institute) ;
  • Bae, Yeong-Bok (Korea Astronomy & Space Science Institute) ;
  • Kim, Chunglee (Korea Astronomy & Space Science Institute) ;
  • Kim, Whansun (National Institute for Mathematical Sciences) ;
  • Oh, John J. (National Institute for Mathematical Sciences) ;
  • Oh, Sang Hoon (National Institute for Mathematical Sciences) ;
  • Park, Chan (Korea Institute of Science and Technology Information) ;
  • Son, Edwin J. (National Institute for Mathematical Sciences) ;
  • Jeong, Minjoong (Korea Institute of Science and Technology Information) ;
  • Norton, Ronald S. (University of Maryland) ;
  • Paik, Ho Jung (University of Maryland)
  • Published : 2017.10.10
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Abstract

SLGT (Superconducting Low-frequency Gravitational-wave Telescope) platform has three arms whose ends support six superconducting test masses. Therefore, any motion of the platform could cause noises on measuring the displacements of test masses which contain the effect of gravitational waves passing by. Thermal motions of the platform are the main noise source, and are related to resonant motions of the platform structure. We briefly report preliminary results of nodal analysis in finite element method performed for various platform configurations including 2-m, 30-m, 50-m and 100-m arm lengths. Platform designs giving resonant frequencies outside of the signal bandwidth (e.g., 0.1~10 Hz) have been identified.

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