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Comparison of natural frequencies of composite cylindrical shells: A squared lattice with its equivalent seamless one

Kargarnovin, M. H ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1115/DETC2010-28399
  3. Abstract:
  4. Modern Latticed composite materials whose high specific strength and stiffness are utilized in spacecraft and rocket structures to a sufficiently high extent are now widely used in primary airframe structures. In this work a comparison between squared latticed composite cylinder shells and the equivalent hollow cylinder with same weight, outer radius, length and material is done. An analytical equation is derived for natural frequency of square latticed composite shells. The first fifth modes are taken to be compared. The analytical and FEM results are shown and compared to each other. Also, as discussed, the squared lattice cylinder shell reaches to their natural frequencies easily than the equivalent hollow cylinder shell
  5. Keywords:
  6. Airframe structures ; Analytical equations ; Composite cylinders ; Composite cylindrical shell ; Composite shell ; High specific strength ; Hollow cylinders ; Cylinders (shapes) ; Design ; Natural frequencies ; Vibrations (mechanical) ; Shells (structures)
  7. Source: Proceedings of the ASME Design Engineering Technical Conference, 15 August 2010 through 18 August 2010 ; Volume 5 , 2010 , Pages 835-841 ; 9780791844137 (ISBN)
  8. URL: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1612470