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Title: Experimental and theoretical modal analysis of full-sized wood composite panels supported on four nodes

Source: Materials. 10(6): 1-15.

Author(s)Guan, Cheng; Zhang, Houjiang; Wang, Xiping; Miao, Hu; Zhou, Lujing; Liu, Fenglu

Publication Year: 2017  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4714-1B

Abstract: Key elastic properties of full-sized wood composite panels (WCPs) must be accurately determined not only for safety, but also serviceability demands. In this study, the modal parameters of full-sized WCPs supported on four nodes were analyzed for determining the modulus of elasticity (E) in both major and minor axes, as well as the in-plane shear modulus of panels by using a vibration testing method. The experimental modal analysis was conducted on three full-sized medium-density fiberboard (MDF) and three full-sized particleboard (PB) panels of three different thicknesses (12, 15, and 18 mm). The natural frequencies and mode shapes of the first nine modes of vibration were determined. Results from experimental modal testing were compared with the results of a theoretical modal analysis. A sensitivity analysis was performed to identify the sensitive modes for calculating E (major axis: Ex and minor axis: Ey) and the in-plane shear modulus (Gxy) of the panels. Mode shapes of the MDF and PB panels obtained from modal testing are in a good agreement with those from theoretical modal analyses. A strong linear relationship exists between the measured natural frequencies and the calculated frequencies. The frequencies of modes (2, 0), (0, 2), and (2, 1) under the four-node support condition were determined as the characteristic frequencies for calculation of Ex, Ey, and Gxy of full-sized WCPs. The results of this study indicate that the four-node support can be used in free vibration test to determine the elastic properties of full-sized WCPs.

Keywords: Wood composite panel; four-node support; modal testing; modal analysis; modulus of elasticity; sensitivity analysis

Publication Review Process: Formally Refereed

File size: 1,024 kb(s)

Date posted: 10/05/2017

This publication is also viewable on Treesearch:  view
RITS Product ID: 88170
Current FPL Scientist associated with this product
Wang, Xiping
Research Forest Products Technologist

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