Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Prediction of Changed Design Parameter of Proportional Damping Structure by Using Modified Dynamic Characteristics

동특성 변화를 이용하여 비례감쇠 구조물의 변경된 설계파라미터 예측

  • Lee, Jung-Youn (Dept. of Mechanical System Engineering, Kyonggi Univ.)
  • 이정윤 (경기대학교 기계시스템공학과)
  • Received : 2010.01.25
  • Accepted : 2010.05.23
  • Published : 2010.07.01
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Abstract

It is common to predict structural dynamic design parameters due to the change of design parameter, but to predict the amount of changed design parameter where the mass and stiffness are being modified are rarely found in previous literature. In this study, the changed design parameter in a proportional damping system is predicted by using sensitivity coefficients and an iterative method. The sensitivity coefficients are determined from the changes in eigenvectors; these changes are due to modification. This method is applied to a three-story shear structure. To validate the prediction of the changed design parameter, the results are compared to the reanalysis results; both results are in good agreement.

일반적으로 설계파라미터 변경에 의한 구조물의 동특성변화를 예측하는 연구에 비해 동특성 변화로부터 변경된 설계파라미터를 예측하는 연구는 잘 알려져 있지 않다. 여기에서는 감도계수와 반복법을 사용하여 비례감쇠계의 변경된 설계파라미터를 예측하였다. 감도계수는 변경에 의한 고유벡터의 변화로부터 구하였다. 이 방법을 3 층 전단 구조물에 적용하여 변경된 설계 파라미터를 예측하였으며 재 해석한 결과와 잘 일치함을 알았다.

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References

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