동특성 변화를 이용하여 트러스 구조물의 손상 예측

다국어 초록 (Multilingual Abstract)

In this paper, a method for accurately predicting truss damage from dynamic changes before and after the damage occurs is proposed. This method is used to analyze sensitivity coefficients based on changes in dynamic characteristics and detect the damage using a modified stiffness matrix. This matrix is obtained using an iterative method of the sensitivity coefficient matrix, and a method to estimate the location of the damage and the degree of truss damage is developed. The proposed method was applied to a seven-bar truss to predict the location and size of damage accurately.

참고문헌 (Reference)

1 손인수, "진동특성을 이용한 외팔보의 크랙 및 손상 검출에 대한 연구" 한국소음진동공학회 19 (19): 935-942, 2009

2 김정호, "동특성 변화를 이용하여 보의 다중 균열 위치 및 크기 해석" 한국소음진동공학회 25 (25): 731-738, 2015

3 Lew, J. S., "Using Transfer Function Parameter Changes for Damage Detection of Structures" 33 (33): 2189-2193, 1995

4 Cawley, P., "The Location of Defects in Structures from Measurement of Natural Frequency" 14 (14): 49-57, 1979

5 Lim, T. W., "Structural Damage Detection of Space Truss Structures Using Best Achievable Eigenvectors" 32 (32): 1049-1057, 1994

6 Fox, R. L., "Rates of Change of Eigenvalues and Eigenvectors" 6 (6): 2426-2429, 1968

7 Hassiotis, S., "Identification of Stiffness Reduction Using Naturalfrequencies" 121 (121): 1106-1113, 1995

8 Liu, P. L., "Identification and Damage Detection of Trusses Using Modal Data" 121 (121): 599-608, 1995

9 Cerri, M. N., "Detection of Damage in Beams Subjected to Diffused Cracking" 234 (234): 259-276, 2000

10 Damodar Maity, "Damage assessment of structures from changes in natural frequencies using genetic algorithm" 국제구조공학회 19 (19): 21-42, 2005

11 Kaveh, A., "Damage Detection of Truss Structures Using an Improved Charged System Search Algorithm" 82-, 2012

12 Mehrjoo, M., "Damage Detection of Truss Bridge Joints using Artificial Neural Networks" 35 (35): 1122-1131, 2008

13 Sahoo, B., "Damage Assessment of Structures Using Hybrid Neuro-genetic Algorithm" 7 (7): 89-104, 2007

14 Valkil-Baghmisheh, M. T., "Crack in Beam-like Structure Using Genetic Algorithms" 8 (8): 1150-1160, 2008

15 Nikolakopoulos, P. G., "Crack Identification in Frame Structures" 64 (64): 389-406, 1997

16 Lahe, A., "An Exact Solution of Truss Vibration Problems" 68 (68): 244-263, 2019

17 Liu, G. R., "A Novel Technique for Inverse Identification of Distributed Stiffness Factor in Structures" 254 (254): 823-835, 2002