A three-step damage identification method based on dynamic characteristics is proposed to improve the structure reliability and security and avoid serious accident. In the proposed method, the frequency and difference...A three-step damage identification method based on dynamic characteristics is proposed to improve the structure reliability and security and avoid serious accident. In the proposed method, the frequency and difference of modal curvature(DMC) are used as damage indexes. Firstly, the detection of the occurrence of damage is addressed by the frequency or the square of frequency change. Then the damage location inside the structure is measured by the DMC. Finally, with the stiffness reduction rate as a damage factor, the amount of damage is estimated by the optimization algorithm. The three-step damage identification method has been validated by conducting the simulation on a cantilever beam and the shaking table test on a submerged bridge. The results show that the method proposed in this paper can effectively solve the damage identification problem in theory and engineering practice.展开更多
The original version of this article unfortunately contained some mistakes.(1)In the“Abstract”section,the text“However,integrating the results of multimodal single-cell data to identify cell-to-cell correspondences...The original version of this article unfortunately contained some mistakes.(1)In the“Abstract”section,the text“However,integrating the results of multimodal single-cell data to identify cell-to-cell correspondences remains a challenging task.Our viewpoint emphasizes the importance of data integration at a biologically relevant level of granularity.Furthermore,it is crucial to take into account the inherent discrepancies between different modalities in order to achieve a balance between biological discovery and noise removal.”was incorrect.This should have read:“Despite providing unprecedented insights into cellular heterogeneity,integrating multimodal single-cell data to find cell-to-cell correspondences remains challenging,primarily due to the need for biologically granular integration and the management of technical and biological discrepancies between modalities.”展开更多
基金Supported by the National Basic Research Program of China("973"Program,No.2011CB013605-4)the National Natural Science Foundation of China(No.51178079)the Major Program of National Natural Science Foundation of China(No.90915011 and No.91315301)
文摘A three-step damage identification method based on dynamic characteristics is proposed to improve the structure reliability and security and avoid serious accident. In the proposed method, the frequency and difference of modal curvature(DMC) are used as damage indexes. Firstly, the detection of the occurrence of damage is addressed by the frequency or the square of frequency change. Then the damage location inside the structure is measured by the DMC. Finally, with the stiffness reduction rate as a damage factor, the amount of damage is estimated by the optimization algorithm. The three-step damage identification method has been validated by conducting the simulation on a cantilever beam and the shaking table test on a submerged bridge. The results show that the method proposed in this paper can effectively solve the damage identification problem in theory and engineering practice.
文摘The original version of this article unfortunately contained some mistakes.(1)In the“Abstract”section,the text“However,integrating the results of multimodal single-cell data to identify cell-to-cell correspondences remains a challenging task.Our viewpoint emphasizes the importance of data integration at a biologically relevant level of granularity.Furthermore,it is crucial to take into account the inherent discrepancies between different modalities in order to achieve a balance between biological discovery and noise removal.”was incorrect.This should have read:“Despite providing unprecedented insights into cellular heterogeneity,integrating multimodal single-cell data to find cell-to-cell correspondences remains challenging,primarily due to the need for biologically granular integration and the management of technical and biological discrepancies between modalities.”
