Enhancing Sustainability in Marine Structures: Nonlinear Energy Sink for Vibration Control of Eccentrically Stiffened Functionally Graded Panels Under Hydrodynamic Loads

Kamran Foroutan and Farshid Torabi ()
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Kamran Foroutan: Energy and Process Systems Engineering, University of Regina, Regina, SK S4S 0A2, Canada
Farshid Torabi: Energy and Process Systems Engineering, University of Regina, Regina, SK S4S 0A2, Canada

Sustainability, 2024, vol. 16, issue 24, 1-17

Abstract: The research examines the impact of nonlinear energy sinks (NES) on the reduction in the nonlinear vibratory responses of eccentrically stiffened functionally graded (ESFG) panels exposed to hydrodynamic loads. To simulate real marine environments, hydrodynamic forces, such as lift and drag that change with velocity, have already been determined experimentally using Matveev’s equations for a particular ship. The material composition of both the panel and the stiffeners varies across their thickness. The stiffeners are modeled using Lekhnitskii’s smeared stiffener approach. Additionally, analytical approaches implement the classical shell theory (CST) with considerations for geometric nonlinearity, along with the Galerkin method for calculations. The P-T method is subsequently employed to determine the nonlinear vibratory behavior of ESFG panels. In this method, the piecewise constant argument is used jointly with the Taylor series expansion, which is why it is named the P-T method. The findings reveal that NES can effectively dissipate vibrational energy, contributing to the extended service life of marine structures while reducing the need for frequent maintenance. This study supports sustainability objectives by increasing energy efficiency, lessening structural fatigue, and improving the overall environmental impact of marine vessels and infrastructure.

Keywords: ESFG panels; NES; nonlinear vibration; hydrodynamic pressures; P-T method (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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