Frequency optimization of laminated composite plates with different intermediate line supports

Topal U.

SCIENCE AND ENGINEERING OF COMPOSITE MATERIALS, vol.19, no.3, pp.295-306, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 19 Issue: 3
  • Publication Date: 2012
  • Doi Number: 10.1515/secm-2012-0004
  • Journal Name: SCIENCE AND ENGINEERING OF COMPOSITE MATERIALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.295-306
  • Keywords: fundamental frequency, intermediate line supports, laminated plates, modified feasible direction method, optimization, RECTANGULAR MINDLIN PLATES, VIBRATION ANALYSIS, INTERNAL SUPPORTS, LOAD
  • Karadeniz Technical University Affiliated: Yes

Abstract

This paper deals with frequency optimization of symmetrically laminated 4-layered angle-ply plates with one or two different intermediate line supports. The design objective is the maximization of the fundamental frequency and the design variable is the fiber orientation in the layers. The first order shear deformation theory and nine-node isoparametric finite element model are used for finding the natural frequencies of laminates. The modified feasible direction method is used for the optimization routine. For this purpose, a program based on FORTRAN is used. Finally, the numerical analysis is carried out to investigate the effects of location of the internal line supports, plate aspect ratios and boundary conditions on the optimal designs and the results are compared.