Dynamic Characters of Stiffened Composite Conoidal Shell Roofs with Cutouts: Design Aids and Selection Guidelines | Zendy

Sarmila Sahoo | Zendy

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Dynamic Characters of Stiffened Composite Conoidal Shell Roofs with Cutouts: Design Aids and Selection Guidelines

Author(s) -

Sarmila Sahoo

Publication year - 2013

Publication title -

journal of engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.244

H-Index - 20

eISSN - 2314-4912

pISSN - 2314-4904

DOI - 10.1155/2013/230120

Subject(s) - structural engineering , shell (structure) , finite element method , parametric statistics , composite number , enhanced data rates for gsm evolution , engineering , benchmark (surveying) , beam (structure) , selection (genetic algorithm) , mode (computer interface) , natural frequency , materials science , computer science , composite material , mechanical engineering , mathematics , acoustics , geology , physics , telecommunications , statistics , geodesy , artificial intelligence , operating system , vibration

Dynamic characteristics of stiffened composite conoidal shells with cutout are analyzed in terms of the natural frequency and mode shapes. A finite element code is developed for the purpose by combining an eight-noded curved shell element with a three-noded curved beam element. The code is validated by solving benchmark problems available in the literature and comparing the results. The size of the cutouts and their positions with respect to the shell centre are varied for different edge constraints of cross-ply and angle-ply laminated composite conoids. The effects of these parametric variations on the fundamental frequencies and mode shapes are considered in details. The results furnished here may be readily used by practicing engineers dealing with stiffened composite conoids with cutouts central or eccentric

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