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Steel and Composite Structures
  Volume 32, Number 4, August25 2019 , pages 509-519
DOI: https://doi.org/10.12989/scs.2019.32.4.509
 


Nonlinear dynamic analysis of spiral stiffened cylindrical shells rested on elastic foundation
Kamran Foroutan, Alireza Shaterzadeh and Habib Ahmadi

 
Abstract
    In this paper, an analytical approach for the free vibration analysis of spiral stiffened functionally graded (SSFG) cylindrical shells is investigated. The SSFG shell is resting on linear and non-linear elastic foundation with damping force. The elastic foundation for the linear model is according to Winkler and Pasternak parameters and for the non-linear model, one cubic term is added. The material constitutive of the stiffeners is continuously changed through the thickness. Using the Galerkin method based on the von Kármán equations and the smeared stiffeners technique, the non-linear vibration problem has been solved. The effects of different geometrical and material parameters on the free vibration response of SSFG cylindrical shells are adopted. The results show that the angles of stiffeners and elastic foundation parameters strongly effect on the natural frequencies of the SSFG cylindrical shell.
 
Key Words
    FG cylindrical shells; non-linear free vibration; spiral stiffeners; damping; elastic foundation
 
Address
Faculty of Mechanical and Mechatronics Engineering, Shahrood University of Technology, Shahrood, Iran.
 

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