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여동준 여수대학교 1998 論文集 Vol.12 No.2
This paper describes the formulation for the analysis of the free vibration of cylindrical shell panels with elastic supports by the transfer influence coefficient method. This method was developed on the base of the concept of the successive transmission of dynamic influence coefficients. The analysis algorithm for cylindrical shell elastically restrained by springs, which plays an important role in many industrial fields, is discussed. The supporting springs have the axial, circumferential, radial and rotational spring constants uniformly distributed along the circumference of the shell. The simple computational results on a personal computer demonstrate the validity of the present method, that is, the numerical high accuracy analysis method and the flexibility for programming, compared with results of the transfer matrix method. We also confirmed that the present algorithm could obtain the solutions of high accuracy for system with a number of intermediate rigid supports. And we could easily treat the intermediate support and all boundary conditions by adequately varying the values of spring constants.
여동준,김명준 여수대학교 2002 論文集 Vol.17 No.-
The analysis algorithm for thick urved plates is discussed as they are extensively used in many industrial fields such in marine, nuclear and aerospace structures. The equations of vibration of a cylindrically thick curved plate based on the Herrmann Mirsky theory are written a coupled set of first order differential equations. By introducing the transfer matrix of the curved plates in the circumferential direction, these equations are written in a matrix differential equation. The supporting springs have the axial, circumferential, radial and two rotational spring constants uniformly distributed along the axis of the curved plates. The natural frequencies are calculated numerically up to higher modes for simple computational models. We also investigated the dynamic characteristics of various of type of vibration arising in the curved plates quantitatively.
김원철,여동준 여수대학교 1997 論文集 Vol.11 No.2
This paper describes the formulation for the analysis of the flexural free vibration of rectangular plate structure with elastic supports and stiffeners by the transfer influence coefficient method. This method was developed on the base of the concept of the successive transmission of dynamic influence coefficients. Rectangular plate are simply supported at two opposite sides, and it has the stiffeners and distributing springs over node line normal to two simply supported edge. The validity of the present method is demonstrated through simple numerical example, and is also compared with results of the transfer matrix method on a personal computer. And all boundary conditions and the intermediate stiff can be treated only by adequately controlling the values of spring constants.
여동준 여수대학교 1999 論文集 Vol.14 No.2
This paper describes the formulation for the analysis of the free vibration of cylindrical shell panels with stiffeners by the transfer influence coefficient method. This method was developed on the base of the successive transmission of dynamic influence coefficients. The simple computational results on a personal computer demonstrate the validity of the present method, that is, the numerical high accuracy analysis method and the flexibility for programming, compared with results of the transfer matrix method. We also confirmed that the present algorithm could obtain the solutions of high accuracy for system with stiffeners.
여동준(D. J. Yeo),조인순(I. S. Cho),최명수(M. S. Choi) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
This paper deals with the free vibrations of a conical shells with variable thickness by the transfer influence coefficient method. The classical thin shell theory based upon the Flugge theory is assumed and the governing equations of a conical shell are written as a coupled set of first order matrix differential equations using the transfer matrix. The Runge-Kutta-Gill integration method are used to solve the governing differential equation. The natural frequencies and corresponding mode shapes are calculated numerically for the conical shells with variable thickness and various boundary conditions at the edges. And all boundary conditions and the intermediate supports between conical shell and foundation could be treated only by adequately varying the values of the spring constants.
여동준(D. J. Yeo),최명수(M. S. Choi),변정환(J. H. Byun),양정규(J. K. Yang),서정주(J. J. Suh) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
In this paper, the authors formulated analytical algorithm for the in-plane free vibration of a annular plate with intermediate support part by the transfer influence coefficient method (TICM) which is based on the successive transmission of influence coefficients on nodal circumferences. To confirm the effectiveness of the suggested algorithm, we analyzed the free vibration of a annular plate with three typical intermediate support parts by the TICM and the Transfer matrix method (TMM) on a personal computer. The computational result was that the TICM was superior to the TMM in the in-plane free vibration analysis of a annular plate with rigid intermediate supports.
여동준 외 전남대학교 수산과학연구소 2006 수산과학연구소논문집 Vol.15 No.1
This paper deals with the free vibrations of folded plates by the transfer influence coefficient method. The governing equations of a non-circular cylindrical shell including a plate as special case are written in a coupled set of first order matrix differential equations. The Runge-Kutta-Gill integration method is used to solve the governing differential equations. The natural frequencies and corresponding mode shapes are calculated numerically for the folded plate of various crank angles. All boundary conditions and the intermediate supports between folded plate and foundation could be treated only by adequately varying the values of the spring constants.
여동준 외 전남대학교 수산과학연구소 2006 수산과학연구소논문집 Vol.14 No.2
This paper deals with the free vibrations of truncated conical shell with elastic supports by the transfer matrix method. The classical thin shell theory based upon the Fl?gge theory is assumed and the governing equations of a conical shell are written as a coupled set of first order differential equations using the transfer matrix. The Runge-Kutta-Gill integration method are used to solve the governing differential equations. The natural frequencies and corresponding mode shapes are calculated numerically for the truncated conical shell with elastic supports and various boundary conditions at the edges. And all boundary conditions and elastic supports between conical shell and foundation could be treated only by adequately varying the values of the spring constants. Numerical results show that the transfer matrix method can accurately obtain natural vibration characteristics of the conical shells with elastic supports.