구조물 연결부의 질량부과 효과 : SEA실험 및 해석 결과 비교

Added Mass Effect on Structural Junction: Comparison of SEA Experimental Results with Analysis

  • 김관주 (홍익대학교 기계ㆍ시스템디자인공학과) ;
  • 김정태 (홍익대학교 기계ㆍ시스템디자인공학) ;
  • 윤태중 (홍익대학교 기계공학과 대학) ;
  • 박봉현
  • 발행 : 2002.05.01

초록

Statistical energy method is widely used for the prediction of vibrational and acoustical behavior of complex structures, such as ship building and automobile in mid-, high frequency ranges. However. in order to convince this SEA result, it is important to verify estimated SEA parameters, e. g. modal density, energy in each subsystem, damping loss factor, coupling loss factor. with possible other method. For modal density parameter, the experimental estimations via Experimental Modal Analysis are checked with those from finite element method for both beam- plate and plate-plate cans. Loss factors are calculated by Lyon's simple method for the two subsystem. finally. modal experiments are carried out by varying the mass added on the junction of two subsystem for the purpose of investigating the influence on the coupling loss factor's behavior.

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