Techno Press
Techno Press

Structural Engineering and Mechanics
  Volume 63, Number 2, July25 2017 , pages 225-235
DOI: https://doi.org/10.12989/sem.2017.63.2.225
 

Dynamic behaviour of orthotropic elliptic paraboloid shells with openings
Kutlu Darilmaz

 
Abstract
    In this paper a vibration study on orthotropic elliptic paraboloid shells with openings is carried out by using a hybrid stress finite element. The formulation of the element is based on Hellinger-Reissner variational principle. The element is developed by combining a hybrid plane stress element and a hybrid plate element. Natural frequencies of orthotropic elliptic paraboloid shells with and without openings are presented. The influence of aspect ratio, height ratio, opening ratio and material angle on the frequencies and mode shapes are investigated.
 
Key Words
    elliptic paraboloid shell;, shell; opening; assumed stress hybrid element; finite element; free vibration
 
Address
Kutlu Darilmaz : Department of Civil Engineering, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey
 
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