Structural Engineering and Mechanics

  • 제20권6호
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  • Pages.631-653
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  • 2005
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Study on structural damping of aluminium using multi-layered and jointed construction

  • Nanda, B.K. (Department of Mechanical Engineering, National Institute of Technology) ;
  • Behera, A.K. (Department of Mechanical Engineering, National Institute of Technology)
  • 투고 : 2004.01.29
  • 심사 : 2005.05.13
  • 발행 : 2005.08.20
⟨ 이전 논문 다음 논문 ⟩

초록

In this work, the mechanism of damping and its theoretical evaluation for layered aluminium cantilever structures jointed with a number of equispaced connecting bolts under an equal tightening torque have been considered. Extensive experiments have been conducted on a number of specimens for comparison with numerical results. Intensity of interface pressure, its distribution pattern, dynamic slip ratio and kinematic coefficient of friction at the interfaces, relative spacing of the connecting bolts, frequency and amplitude of excitation are found to play a major role on the damping capacity of such structures. It is established that the damping capacity of structures jointed with connecting bolts can be improved largely with an increase in number of layers maintaining uniform intensity of pressure distribution at the interfaces. Thus the above principle can be utilized in practice for construction of aircraft and aerospace structures effectively in order to improve their damping capacity which is one of the prime considerations for their design.

키워드

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