Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Identification of Damage on a Substructure with Measured Frequency Response Functions

  • Park Nam-Gyu (Nuclear Fuel Design Department, Korea Nuclear Fuel Co. LTD.) ;
  • Park Youn-Sik (Center for Noise and Vibration Control, Department of Mechanical Engineering Korea Advanced Institute of Science and Technology)
  • Published : 2005.10.01
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Abstract

Recently the authors tried to find damage position only using measured frequency response functions. According to their work, it seems that the algorithm is very practical since it needs only measured frequency responses while other methods require exact analytic model. But when applying the method to a real structure, it requires lots of experiment. The authors, in this time, propose a method to reduce its experimental load by detecting damage within a substructure. This method searches damages not within an entire structure but within substructures. In addition, damage severity was treated in this paper since it is worthy to know damage severity. Optimization technique is used to estimate damage level using measured responses and damage model. Two test examples, a plate and a jointed structure, are chosen to verify the suggesting method.

Keywords

References

  1. Bendat, J. S. and Piersol, A. G., 1993, 'Engineering Application of Correlation and Spectral Anlysis,' John Wiley & Sons Inc.
  2. Choi, Y. J. and Lee, U., 2003, 'An Accelerated Inverse Perturbation Method for Structural Damage Identification,' KSME Int. Journal, 17(5), pp. 637-646
  3. Dennis, J. E. and Schnabel, R. B., 1983, 'Numerical Methods for Unconstrained Optimization and Nonlinear Equations,' Prentice-Hall Inc.
  4. Doebling, S. W., Hemez, F. M., Peterson, L. D. and Fahrat, C., 1997, 'Improved Damage Location Accuracy Using Strain Energy-Based Mode Selection Criteria,' AIAA journal, 35(3), pp. 693-699 https://doi.org/10.2514/2.159
  5. Kaouk, M. and Zimmerman, D. C., 1994, 'Structural Damage Assessment Using a Generalized Minimum Rank Perturbation Theory,' AIAA Journal, 32(4), pp. 836-842 https://doi.org/10.2514/3.12061
  6. Maia, N. M. M. and Silva, J. M. M., 1998, 'Theoretical and Experimental Modal Analysis,' Research Studies Press LTD.
  7. Marwala, T. and Heyns, S., 1998, 'Multiple-Criterion Method for Determining Structural Damage,' AIAA Journal, 36(8), pp. 1494-1501 https://doi.org/10.2514/2.543
  8. Park, N. G. and Park, Y. S., 2003, 'Damage Detection Method Using Spatially Incomplete Frequency Response Functions,' Mechanical Systems and Signal Processing, 17(3), pp. 519-532 https://doi.org/10.1006/mssp.2001.1423
  9. Sanayei, M. and Onipede, O., 1991, 'Damage Assessment of Structures Using Static Test Data,' AIAA Journal, 29(7), pp. 1174-1179 https://doi.org/10.2514/3.10720
  10. Tsuei, Y. G. and Yee Eric, K. L., 1989, 'A Method for Modifying Dynamic Properties of Undamped Mechanical Systems,' J. Dynamic Systems, Measurement and Control, ASME, 111, pp.403-408 https://doi.org/10.1115/1.3153068