Author
Y. Muramoto
Bio: Y. Muramoto is an academic researcher from Hokkaido University. The author has contributed to research in topics: Transfer matrix & Boundary value problem. The author has an hindex of 2, co-authored 3 publications receiving 122 citations.
Papers
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TL;DR: In this paper, the free vibration analysis of joined conical-cylindrical shells is presented, where the governing equations of vibration of a conical shell, including a cylindrical shell as a special case, are written as a coupled set of first order differential equations by using the transfer matrix of the shell.
129 citations
TL;DR: In this article, the axisymmetrical response of a double-shell system with internal damping to a time-dependent surface load is determined by the matrix analysis method, where the equations of vibration of the system based upon the Goldenveizer-Novozhilov theory are written as a coupled set of first order differential equations by the use of the state vector.
20 citations
TL;DR: In this article, the steady state response of a damped circular plate driven by a sinusoidally varying transverse deflection or angular rotation at a diameter is determined by the series-type method, with the reaction force or moment acting along a diameter of a circular plate regarded as an unknown harmonic load.
1 citations
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TL;DR: In this paper, the free vibrational characteristics of isotropic coupled conical-cylindrical shells are analyzed using two different methods: a wave solution and a power series solution.
126 citations
109 citations
TL;DR: In this article, a modified variational method for dynamic analysis of ring-stiffened conical-cylindrical shells subjected to different boundary conditions is presented, which involves partitioning the stiffened shell into appropriate shell segments in order to accommodate the computing requirement of high-order vibration modes and responses.
Abstract: This work presents a modified variational method for dynamic analysis of ring-stiffened conical–cylindrical shells subjected to different boundary conditions. The method involves partitioning of the stiffened shell into appropriate shell segments in order to accommodate the computing requirement of high-order vibration modes and responses. All essential continuity constraints on segment interfaces are imposed by means of a modified variational principle and least-squares weighted residual method. Reissner-Naghdi's thin shell theory combined with the discrete element stiffener theory to consider the ring-stiffening effect is employed to formulate the theoretical model. Double mixed series, i.e., the Fourier series and Chebyshev orthogonal polynomials, are adopted as admissible displacement functions for each shell segment. To test the convergence, efficiency and accuracy of the present method, both free and forced vibrations of non-stiffened and stiffened shells are examined under different combinations of edge support conditions. Two types of external excitation forces are considered for the forced vibration analysis, i.e., the axisymmetric line force and concentrated point force. The numerical results obtained from the present method show good agreement with previously published results and those from the finite element program ANSYS. Effects of structural damping on the harmonic vibration responses of the stiffened conical–cylindrical–conical shell are also presented.
106 citations
TL;DR: In this article, the free vibration of a structure consisting of a finite circular cylindrical shell closed at one end by a circular plate is analyzed by means of continuous distributions of springs along the shell and the plate interface.
102 citations
TL;DR: In this paper, the free vibration characteristics of the joined spherical-cylindrical shell with various boundary conditions are investigated, and the boundary conditions considered herein are free-free, simply supported-free and clamped-free for the joined cylindrical-spherical shell structures.
98 citations