Experimental and Theoretical Modal Analysis of Full-Sized Wood Composite Panels Supported on Four Nodes
TLDR
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.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.read more
Citations
More filters
ReportDOI
Proceedings: 19th International Nondestructive Testing and Evaluation of Wood Symposium
TL;DR: In this paper, the influence of EMC was studied over four batches of 15 specimens each, conditioned for 6-8 weeks before testing at a temperature of 20 ± 2oC and at four different relative humidities (50, 65, 85, and 95%).
Journal ArticleDOI
Fast and accurate bending modulus prediction of 3D woven composites via experimental modal analysis
TL;DR: In this article, an original mixed numerical-experimental identification method was proposed and used to predict the bending modulus of 3D woven composites using the first natural frequency of their cantilever beam.
Journal ArticleDOI
Eco-friendly fiberboard production without binder using poplar wood shavings bio-pretreated by white rot fungi Coriolus versicolor
Jianguo Wu,Chen Chunyan,Haiyang Zhang,Xia Lin,Yiming Huang,Hui Huang,Yuanyuan Wang,Dong Qian,Jing Wang,Xinfeng Wang,Zhang Tong +10 more
TL;DR: In this article, an Eco-friendly fiberboard was produced without binder using poplar wood shavings (PWS) bio-pretreated by white rot fungi Coriolus versicolor, and the correlations between the metabolites and lignocellulose components and the bending strength (BS) of fiberboard were also studied.
Journal ArticleDOI
Evaluation of modulus of elasticity and modulus of rupture of full-size wood composite panels supported on two nodal-lines using a vibration technique
Journal ArticleDOI
Study on the Damping Dynamics Characteristics of a Viscoelastic Damping Material
TL;DR: In this paper , the authors use the Dynamic Mechanical Analysis (DMA) characterization data of viscoelastic damping materials and dynamic characteristics experiments to study the dynamic characteristics of structural damping, analyze and summarize the relationship between the performance of damping material with temperature and frequency, and explore the influencing factors of dampings materials on structural vibration.
References
More filters
Book
Modal Testing: Theory and Practice
TL;DR: A survey of the technology of modal testing, a new method for describing the vibration properties of a structure by constructing mathematical models based on test data rather than using conventional theoretical analysis.
Book
Vibration of Plates
TL;DR: Vibration of Plates as discussed by the authors provides a comprehensive, self-contained introduction to vibration theory and analysis of two-dimensional plates, including boundary characteristically orthogonal polynomials (BCOPs).
Journal ArticleDOI
Cross-Laminated Timber Plates: Evaluation and Verification of Homogenized Elastic Properties
TL;DR: In this paper, a fully automated procedure to determine global elastic properties of full-scale cross-laminated wood panels is developed, where an analytical model based on Reddy's higher order plate theory is applied to calculate natural frequencies and mode shapes numerically.
Journal ArticleDOI
Determination of shear modulus on construction size timber
TL;DR: In this paper, three different techniques were used: torsional vibration, simultan E&G, and variation of span technique to determine the shear modulus of 2 by 4 timbers.