A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Variational mode decomposition based modal parameter identification in civil engineering
Abstract An out-put only modal parameter identification method based on variational mode decomposition (VMD) is developed for civil structure identifications. The recently developed VMD technique is utilized to decompose the free decay response (FDR) of a structure into to modal responses. A novel procedure is developed to calculate the instantaneous modal frequencies and instantaneous modal damping ratios. The proposed identification method can straightforwardly extract the mode shape vectors using the modal responses extracted from the FDRs at all available sensors on the structure. A series of numerical and experimental case studies are conducted to demonstrate the efficiency and highlight the superiority of the proposed method in modal parameter identification using both free vibration and ambient vibration data. The results of the present method are compared with those of the empirical mode decomposition-based method, and the superiorities of the present method are verified. The proposed method is proved to be efficient and accurate in modal parameter identification for both linear and nonlinear civil structures, including structures with closely spaced modes, sudden modal parameter variation, and amplitude-dependent modal parameters, etc.
Variational mode decomposition based modal parameter identification in civil engineering
Abstract An out-put only modal parameter identification method based on variational mode decomposition (VMD) is developed for civil structure identifications. The recently developed VMD technique is utilized to decompose the free decay response (FDR) of a structure into to modal responses. A novel procedure is developed to calculate the instantaneous modal frequencies and instantaneous modal damping ratios. The proposed identification method can straightforwardly extract the mode shape vectors using the modal responses extracted from the FDRs at all available sensors on the structure. A series of numerical and experimental case studies are conducted to demonstrate the efficiency and highlight the superiority of the proposed method in modal parameter identification using both free vibration and ambient vibration data. The results of the present method are compared with those of the empirical mode decomposition-based method, and the superiorities of the present method are verified. The proposed method is proved to be efficient and accurate in modal parameter identification for both linear and nonlinear civil structures, including structures with closely spaced modes, sudden modal parameter variation, and amplitude-dependent modal parameters, etc.
Variational mode decomposition based modal parameter identification in civil engineering
Zhang, Mingjie (author) / Xu, Fuyou (author)
Frontiers of Structural and Civil Engineering ; 13 ; 1082-1094
2019-06-06
13 pages
Article (Journal)
Electronic Resource
English
Output-only modal parameter identification of civil engineering structures
| British Library Online Contents | 2004
Modal Parameter Identification of Civil Engineering Structures under Seismic Excitations
| Trans Tech Publications | 2013
Modal Parameter Identification of Civil Engineering Structures under Seismic Excitations
| British Library Conference Proceedings | 2014
| SAGE Publications | 2022