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A study on the Modeling and Dynamic Analysis of Cracked Beam Structures  

홍성욱 (금오공과대학교 기계공학부)
김만달 (금오공과대학교 대학원)
이종원 (한국과학기술원 기계공학과)
Publication Information
Journal of the Korean Society for Precision Engineering / v.20, no.6, 2003 , pp. 197-204 More about this Journal
Abstract
This paper presents an efficient modeling and dynamic analysis method for open cracked beam structures. An equivalent bending spring model is introduced to represent the structural weakening effect in the presence of cracks. The proposed method adopts the exact dynamic element method (EDEM) to avoid the inconvenience and numerical errors in association with re-meshing the structural model with the crack position changed. The proposed modeling method is validated through a series of simulation and experiments. First, the proposed method is rigorously compared with a commercial finite element code. Then, two kinds of experiments are performed to validate the proposed modeling method. Finally, a diagnostic scheme fur open cracked beam structures is proposed and demonstrated through a numerical example.
Keywords
Open crack; Flexibility; Finite element method; beam; Exact dynamic element; Natural frequency; Modal testing;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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