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Steel and Composite Structures Volume 32, Number 2, July25 2019 , pages 253-264 DOI: https://doi.org/10.12989/scs.2019.32.2.253 |
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Combination resonance analysis of FG porous cylindrical shell under two-term excitation |
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Habib Ahmadi and Kamran Foroutan
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Abstract | ||
This paper presents the combination resonances of FG porous (FGP) cylindrical shell under two-term excitation. The effect of structural damping on the system response is also considered. With regard to classical plate theory of shells, von-Karman equation and Hook law, the relations of stress-strain is derived for shell. According to the Galerkin method, the discretized motion equation is obtained. The combination resonances are obtained by using the method of multiple scales. Four types of FGP distributions consist of uniform porosity, non-symmetric porosity soft, non-symmetric porosity stiff and symmetric porosity distribution are considered. The influence of various porosity distributions, porosity coefficients of cylindrical shell and amplitude excitations on the combination resonances for FGP cylindrical shells is investigated. | ||
Key Words | ||
cylindrical shell; FG porous material; combination resonance; multiple scales method; two-term excitation | ||
Address | ||
Faculty of Mechanical Engineering, Shahrood University of Technology, Shahrood, Iran. | ||