Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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System Condensation Technique-Based Inverse Perturbation Method of Damage Detection

시스템 축소기법이 적용된 역섭동법을 이용한 손상탐지

  • 최영재 (인하대학교 기계공학과) ;
  • 이우식 (인하대학교 기계공학과)
  • Published : 2002.10.01
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Abstract

System condensation technique improves the efficiency of the inverse perturbation method of damage detection developed in the previous work. The technique is applied to transform the unmeasured DOFs to the measured DOFs. This approach makes it possible to eliminate the unmeasured DOFs, which accelerates the computational efficiency. The numerical instability problems due to the system condensation technique are also resolved by updating the transformation matrix for each step, and also by adopting the accelerated improved reduced system(AIRS) condensation method.

본 연구에서는 역섭동법을 이용한 손상탐지의 효율을 개선하는 목적으로 시스템 축소기법을 사용하였다. 이 방법은 손상탐지의 미측정 자유도를 측정된 자유도로 변환하여 역섭동법의 계산효율이 향상되는 장점이 있으나, 부정확한 자유도의 변환으로 수치적인 안정성이 저하될 수 있다. 따라서 자유도 변환식을 수치해법 과정에서 반복적으로 개선하는 방법과, 매우 정확한 accelerated improved reduced system (AIRS) 축소법의 사용으로 역섭동법의 수치적 불안정성을 해결하였다.

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References

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