Variational Mode Decomposition-Based Method for Separation of Measured Responses of Structures

14 Pages Posted: 22 Mar 2022

See all articles by Wei Lu

Wei Lu

Harbin Institute of Technology, Shenzhen

Yan Cui

affiliation not provided to SSRN

Weihua Hu

Harbin Institute of Technology, Shenzhen

Chao Wang

Harbin Institute of Technology, Shenzhen

Jun Teng

Harbin Institute of Technology, Shenzhen

Abstract

To investigate the influence of varying loads on the structural response, a method is proposed for separating the measured responses of structures based on variational modal decomposition. The boundary frequencies of the gradually varying temperature response and transient wind load response components were determined and a constrained variational model based on the sum of the estimated bandwidths was established. We used the alternating direction multiplier method to solve the eigenmode function corresponding to the minimization of the variational model, realizing the synchronous and non-linear separation of the structural temperature effect and the structural transient load effect in the measured response was. Using the measured stress of the large shell structure of the Zhuhai Grand Theater under the impact of the typhoon effect as an example, the feasibility and effectiveness of the method were verified.

Keywords: structural health monitoring, Response Separation, variational mode decomposition, Temperature Effects, Wind Vibration Effects.

Suggested Citation

Lu, Wei and Cui, Yan and Hu, Weihua and Wang, Chao and Teng, Jun, Variational Mode Decomposition-Based Method for Separation of Measured Responses of Structures. Available at SSRN: https://ssrn.com/abstract=4049644 or http://dx.doi.org/10.2139/ssrn.4049644

Wei Lu (Contact Author)

Harbin Institute of Technology, Shenzhen ( email )

University Town
Nand District
Shenzhen
China

Yan Cui

affiliation not provided to SSRN ( email )

No Address Available

Weihua Hu

Harbin Institute of Technology, Shenzhen ( email )

University Town
Nand District
Shenzhen
China

Chao Wang

Harbin Institute of Technology, Shenzhen ( email )

University Town
Nand District
Shenzhen
China

Jun Teng

Harbin Institute of Technology, Shenzhen ( email )

University Town
Nand District
Shenzhen
China

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