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이용봉,정성수,신수현,차동진 한밭대학교 생산융합기술연구소 2004 생산기반기술연구소 논문집 Vol.4 No.1
There are many standard methods measuring the loss factor of the sheet type material. Among them three methods are introduced - vibration decay method, steady excitation method and suspending impact excitation method. Theoretical basis of them are explained in detail to help deep understanding of the methods. Loss factor of the steel sheet are estimated using three different methods and their results are compared. Standard methods are applied to prepare the specimen, test and estimate the data. It appeared that claimed-free broad band excitation method could give loss factors depending on the frequency and the most robust estimates.