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논문 기본 정보

자료유형
학술저널
저자정보
Bae, S.H. (School of Mechanical Engineering, Pusan National University) Cho, J.R. (Department of Naval Architecture and Ocean Engineering, Hongik University) Jeong, W.B. (School of Mechanical Engineering, Pusan National University)
저널정보
테크노프레스 Smart structures and systems Smart structures and systems 제17권 제5호
발행연도
2016.1
수록면
753 - 771 (19page)

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This paper addresses the free and transient responses of a SDOF linear complex stiffness system by making use of the Hilbert transform and the convolution integral. Because the second-order differential equation of motion having the complex stiffness give rise to the conjugate complex eigen values, its time-domain analysis using the standard time integration scheme suffers from the numerical instability and divergence. In order to overcome this problem, the transient response of the linear complex stiffness system is obtained by the convolution integral of a green function which corresponds to the unit-impulse free vibration response of the complex system. The damped free vibration of the complex system is theoretically derived by making use of the state-space formulation and the Hilbert transform. The convolution integral is implemented by piecewise-linearly interpolating the external force and by superimposing the transient responses of discretized piecewise impulse forces. The numerical experiments are carried out to verify the proposed time-domain analysis method, and the correlation between the real and imaginary parts in the free and transient responses is also investigated.

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