비선형 최소제곱법을 이용한 점탄성 감쇠를 갖는 원통셀의 실험진동해석

It is a recent trend for advanced ships and submarines to incorporate composite structures with viscoelastically damping material. Much research has been done on curve-fitting techniquesto identify vibration characteristic parameters such as natural frequencies, modal damping ratios, and mode shapes...

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Published inHan-guk haeyang gonghak hoeji (Online) Vol. 22; no. 3; pp. 41 - 46
Main Authors 민천홍, 박한일, 배수룡, Min, Cheon-Hong, Park, Han-Il, Bae, Soo-Ryong
Format Journal Article
LanguageKorean
Published 2008
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Abstract It is a recent trend for advanced ships and submarines to incorporate composite structures with viscoelastically damping material. Much research has been done on curve-fitting techniquesto identify vibration characteristic parameters such as natural frequencies, modal damping ratios, and mode shapes of the composite structure. In this study, an advanced technique for accurately determining vibration characteristic of a circular cylindrical shell-attached viscoelastically damping material is used, based on a multi-degree of freedom (MDOF) curve-fitting method. First, an initial value is obtained by using a linear least square method. Next, using the initial value, the exact modal parameters of the composite circular cylindrical shell are obtained by using a nonlinear least square method. Results show computation time is greatly decreased and accurate results are obtained by the MDOF curve-fitting method.
AbstractList It is a recent trend for advanced ships and submarines to incorporate composite structures with viscoelastically damping material. Much research has been done on curve-fitting techniquesto identify vibration characteristic parameters such as natural frequencies, modal damping ratios, and mode shapes of the composite structure. In this study, an advanced technique for accurately determining vibration characteristic of a circular cylindrical shell-attached viscoelastically damping material is used, based on a multi-degree of freedom (MDOF) curve-fitting method. First, an initial value is obtained by using a linear least square method. Next, using the initial value, the exact modal parameters of the composite circular cylindrical shell are obtained by using a nonlinear least square method. Results show computation time is greatly decreased and accurate results are obtained by the MDOF curve-fitting method.
Author Park, Han-Il
배수룡
민천홍
Min, Cheon-Hong
박한일
Bae, Soo-Ryong
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  fullname: Park, Han-Il
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  fullname: Bae, Soo-Ryong
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Snippet It is a recent trend for advanced ships and submarines to incorporate composite structures with viscoelastically damping material. Much research has been done...
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Title 비선형 최소제곱법을 이용한 점탄성 감쇠를 갖는 원통셀의 실험진동해석
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