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황대웅(Hwang, Dae-Woong),서성훈(Seo, Seong-Hoon),권현웅(Kwon, Hyun-Wung),홍석윤(Hong, Suk-Yoon) 한국소음진동공학회 2007 한국소음진동공학회 논문집 Vol.17 No.7
PFA (power flow analysis) has been recognized as a useful method in vibration analysis of medium-to-high frequency ranges. Until now, PFA method has been developed for steady-state vibration problems. In this paper, PFA method has been expanded to transient problem. New energy governing equations are derived considering time dependent terms in beam and plate. Analytic solutions of those equations are found in simple beam and plate, and are verified by comparing with modal solutions.