Damage identification of bridge crane metal structure based on mode shape curvature and RSM

In order to maintain the integrity and safety of crane metal structure, a damage identification method based on mode shape curvature and response surface methodology (RSM) is proposed in this paper. Basically, mode curvature method is used to identify damage location. Then the central composite design method is selected to establish quadratic response surface for identification of damage severity. Finally, numerical simulation of a QD50/10-31.5A5 universal bridge crane is conducted to verify the proposed method. The results show that the proposed method can identify multiple damage of the structure accurately with improved identification efficiency due to the application of RSM. © 2019, Politechnica University of Bucharest. All rights reserved.