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A solution method for free vibration analysis of coupled laminated composite elliptical-cylindrical-elliptical shell with elastic boundary conditions

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Journal of Ocean Engineering and Science 2022年第2期7卷 112-130页

作者： Kwanghun Kim yongsu jon Kwangil An Songhun Kwak yongsu Han Department of Engineering Machine Pyongyang University of Mechanical EngineeringPyongyang 999093Democratic People’s Republic of Korea Information center Kim Chaek University of TechnologyPyongyang 950003Democratic People’s Republic of Korea College of Mechanical Science and Technology Kim Chaek University of TechnologyPyongyang 950003Democratic People’s Republic of Korea

In this paper,an efficient,convenient and explicit method based on the Haar wavelet discretization ap-proach for analyzing the free vibration of the coupled laminated composite elliptical-cylindrical-elliptical shells(ECESs)with elastic boundary conditions is *** elliptical double curved shells are cou-pled on both end of cylindrical *** on the first-order shear deformation theory the equations of motion for ECES are derived by means of Hamilton’s *** separation of variables is first per-formed;*** components and rotations of any point of the ECES are expanded to the Haar wavelet series in the meridian direction and Fourier series in circumferential *** constants appearing from the integrating process are determined by boundary conditions,and thus the partial dif-ferential equations are transformed into algebraic *** solving the characteristic equation,the natural frequencies and mode shapes of coupled laminated composite ECES are *** present re-sults have been compared with those of the published *** comparison results show that this method has high accuracy,high reliability and also a higher convergence rate in attaining the frequencies of the coupled laminated composite ***,the effects of the main parameters such as material properties,geometrical parameters,and various boundary conditions,on the vibrational behavior of the coupled ECESs,are ***,new free vibration analysis results of the coupled laminated com-posited ECES,which can be used as benchmark data for researchers in this field,are reported through the parameter study.

关键词： Free vibration Haar wavelet discretization method Coupled shell structure Elastic boundary condition

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