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Estimation of Strain at Elastic System Using Acceleration Response

가속도 데이터를 활용한 선형 시스템의 변형률 예측

  • 김찬중 (자동차부품연구원) ;
  • 이봉현 (자동차부품연구원) ;
  • 전현철 (서울대학교 대학원 기계항공공학부) ;
  • 조현호 (서울대학교 대학원 기계항공공학부) ;
  • 강연준 (서울대학교 기계항공공학부(정밀기계설계공동연구소))
  • Received : 2011.08.23
  • Accepted : 2011.12.09
  • Published : 2012.01.20

Abstract

This paper investigates the prediction of the dynamic strain response using acceleration response only. Two methods are proposed for the strain prediction; one is based on beam theory and the other is calculated by the frequency response function between acceleration and strain. First, it is estimated the dynamics of the simple notched beam, including the non-linearity, through the uni-axial vibration testing. Then, the dynamic strain response is predicted under two different methods using acceleration response. The validation of proposed methods is conducted by the comparison between measured strain and predicted values. The comparison reveals that the proposed method based on the FRF between acceleration and strain is more reliable one than that stemmed from beam theory and the maximum relative error is less than 8 %.

Acknowledgement

Grant : 오일펌프의 엔진상태 성능 평가기술 개발

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  1. Modal Analysis Based Stress Estimation for Structural Elements Subjected to Operational Dynamic Loadings vol.55, pp.9, 2015, https://doi.org/10.1007/s11340-015-0073-6