다자유도 곡선맞춤법을 이용한 감쇠보 모델의 실험 진동해석

• Published in: Han-guk haeyang gonghak hoeji (Online) Vol. 22; no. 1; pp. 70 - 74
• Main Authors: 민천홍(CHEON-HONG MIN), 박한일(HAN-IL PARK), 배수룡(SOO-RYONG BAE)
• Format: Journal Article
• Language: Korean
• Published: 한국해양공학회 2008
• Subjects: 해양공학; Damped beam model 감쇠 보 모델; Experimental modal analysis 실험모드해석법; Modal parameter 모드변수; Modal identification 모드추출; Curve fitting method 곡선맞춤범
• ISSN: 1225-0767; 2287-6715

It is important to reduce the vibration and noise of submarines and ships. For the purpose of noise reduction, various researches are actively being conducted on the employment of complex structures. However, in the case of numerical analysis for complex structures with damping materials, substantial errors can be generated by the absence of an exact damping model. Thus experimental model analysis is necessary for the verification of a numerical analysis for complex structures. In this research, vibration experiments are conducted in order to ascertain the vibration properties of cantilever beam attached damping materials. First, an initial value is obtained by using a direct linear method. Next, based on this initial value, the exact modal parameters of the cantilever beam are obtained by using the Newton-Raphson method.