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Open AccessArticle

A Novel Approach to Perform the Identification of Cross-Section Deformation Modes for Thin-Walled Structures in the Framework of a Higher Order Beam Theory

by 1,*, 1,* and 2
1
College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, China
2
Department of Mechanical Engineering, University of Maryland, Baltimore County, Baltimore, MD 21250, USA
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2019, 9(23), 5186; https://doi.org/10.3390/app9235186
Received: 3 November 2019 / Revised: 22 November 2019 / Accepted: 26 November 2019 / Published: 29 November 2019
(This article belongs to the Section Mechanical Engineering)
This paper presents a novel approach to identify cross-section deformation modes for thin-walled structures by assembling preliminary deformation modes (PDM) considering their participation in free vibration modes. These PDM, defined over the cross-section through kinematic concepts, are integrated in the governing equations of a higher order model and then uncoupled in the form of generalized eigenvectors. The eigenvectors are deemed to inherit the attributes of structural behaviours and can serve as the basis to assemble PDM. Accordingly, a criterion was developed to handle the eigenvectors, pursuing (i) the clustering of PDM that participate in a same structural behaviour, (ii) the assignation of the corresponding weights that indicate their participation and (iii) the decomposition of an amplitude function when it is related to several structural behaviours. Moreover, a numbering system was proposed to hierarchically organize the deformation modes, which is conducive to a reduced higher order model. The main features of this approach are found in its ability to be performed in a more operational way and its nature to give deformation modes physical interpretation inherited from the dynamic behaviours. The versatility of the approach was validated through both numerical examples and comparisons with other theories. View Full-Text
Keywords: thin-walled structures; cross-section deformation modes; a higher order beam theory; generalized eigenvectors; relevance analysis thin-walled structures; cross-section deformation modes; a higher order beam theory; generalized eigenvectors; relevance analysis
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MDPI and ACS Style

Zhang, L.; Ji, A.; Zhu, W. A Novel Approach to Perform the Identification of Cross-Section Deformation Modes for Thin-Walled Structures in the Framework of a Higher Order Beam Theory. Appl. Sci. 2019, 9, 5186. https://doi.org/10.3390/app9235186

AMA Style

Zhang L, Ji A, Zhu W. A Novel Approach to Perform the Identification of Cross-Section Deformation Modes for Thin-Walled Structures in the Framework of a Higher Order Beam Theory. Applied Sciences. 2019; 9(23):5186. https://doi.org/10.3390/app9235186

Chicago/Turabian Style

Zhang, Lei; Ji, Aimin; Zhu, Weidong. 2019. "A Novel Approach to Perform the Identification of Cross-Section Deformation Modes for Thin-Walled Structures in the Framework of a Higher Order Beam Theory" Appl. Sci. 9, no. 23: 5186. https://doi.org/10.3390/app9235186

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