Frequency Analysis of Ring-Stiffened Composite Cylindrical Shell using Experimental, Analytical and Finite Element Methods

Subject Areas : composite materials

Hadi Salimi ¹ , Ali Davar ² , Mohsen Heydari Beni ³ , Jafar Eskandari Jam ⁴ , Majid Eskandari Shahraki ⁵

1 - Department of Mechanical Engineering, Malek Ashtar University of Technology, Tehran, Iran.
2 - Composite Research Centre, Malek Ashtar University of Technology, Lavizan, Tehran, Iran.
3 - Department of Mechanical Engineering, Malek Ashtar University of Technology, Tehran, Iran.
4 - Composite Research Centre, Malek Ashtar University of Technology, Lavizan, Tehran, Iran.
5 - Department of Aerospace Engineering, Ferdowsi University of Mashhad, Mashhad, Iran.

Received: 2020-09-03 Accepted : 2020-12-01 Published : 2023-06-01

Keywords: Galerkin Method, Boundary conditions, composite cylindrical shells, reinforcement rings, Free vibration,

Abstract :

In this paper, free vibration of laminated composite cylindrical shells reinforced with circumferential rings, are investigated with experimental, analytical and finite element methods and natural frequencies are obtained. The analysis is carried out for clamp-free and clamp-clamp boundary conditions and the results are compared with each other. To solve the problem, the equilibrium Equations of motions are written according to the classical shells theory and after simplification, the structural stiffness and mass matrices and the frequency Equation are derived using Galerkin method. The results obtained in this paper, are compared with the results available in the literatures, and the results of experimental and finite element methods and good agreement is observed.

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