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Experimental modal analysis of a cross-laminated timber slab

https://research.thinkwood.com/en/permalink/catalogue3009
Year of Publication
2022
Topic
Acoustics and Vibration
Material
CLT (Cross-Laminated Timber)
Author
Kawrza, M.
Furtmüller, T.
Adam, C.
Maderebner, R.
Organization
University of Innsbruck
Publisher
Elsevier
Year of Publication
2022
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Acoustics and Vibration
Keywords
Experimental Modal Analysis
Complex Mode Shapes
Modal Parameter Estimation
Conference
37th Danubia Adria Symposium on Advances in Experimental Mechanics
Research Status
Complete
Series
Materials Today: Proceedings
Summary
This paper presents the results of an investigation of the dynamic response of a point-supported cross-laminated timber (CLT) slab without joists with a column grid of 5.0 × 5.0 m and overall dimensions of 16.0 × 11.0 × 0.2 m. The results are based on a detailed experimental modal analysis, identifying seven modes from the dynamic response of 651 measurement points, including natural frequencies, mode shapes and damping ratios. These modal parameters exhibit a time variance that is due to environmental influences during the measurement period of two days. As a result of this disturbance effect, the determined mode shapes have a non-negligible imaginary part, which is eliminated by correcting each of the 73 measurements individually. The findings presented provide in-depth insight into the dynamic behavior of the large-scale CLT structure with point supports realized with a novel steel connector.
Online Access
Free
Resource Link
Less detail

Model Calibration of Wooden Structure Assemblies - Using EMA and FEA

https://research.thinkwood.com/en/permalink/catalogue638
Year of Publication
2014
Topic
Acoustics and Vibration
Material
LVL (Laminated Veneer Lumber)
Application
Wood Building Systems
Author
Bolmsvik, Åsa
Linderholt, Andreas
Olsson, Jörgen
Year of Publication
2014
Format
Conference Paper
Material
LVL (Laminated Veneer Lumber)
Application
Wood Building Systems
Topic
Acoustics and Vibration
Keywords
Experimental Modal Analysis
Finite Element Model
Sound Transmission
Vibrational Tests
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
To predict and, when needed to fulfil regularizations or other requirements, lower the impact sound transmission in light weight buildings prior to building, dynamically representative calculation models are needed. The material properties of commonly used building components have a documented spread in literature. Therefore, to validate the junction models, the dynamics of the actual assembly components have to be known. Here, the dynamic properties of a number of component candidates are measured using hammer excited vibrational tests. The spread of the properties of the components are hereby gained. Some of the components are selected to build up wooden assemblies which are evaluated first when they are screwed together and later when they are screwed and glued together. The focus is here on achieving representative finite element models of the junctions between the building parts composing the assemblies.
Online Access
Free
Resource Link
Less detail

Model Calibration of Wooden Strucuture Assemblies - Using EMA and FEA

https://research.thinkwood.com/en/permalink/catalogue1001
Year of Publication
2014
Topic
Acoustics and Vibration
Material
LVL (Laminated Veneer Lumber)
Application
Wood Building Systems
Author
Bolmsvik, Åsa
Linderholt, Andreas
Olsson, Jörgen
Year of Publication
2014
Format
Conference Paper
Material
LVL (Laminated Veneer Lumber)
Application
Wood Building Systems
Topic
Acoustics and Vibration
Keywords
Finite Element Model
Experimental Modal Analysis
Impact Sound Transmission
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
To predict and, when needed to fulfil regularizations or other requirements, lower the impact sound transmission in light weight buildings prior to building, dynamically representative calculation models are needed. The material properties of commonly used building components have a documented spread in literature. Therefore, to validate the junction models, the dynamics of the actual assembly components have to be known. Here, the dynamic properties of a number of component candidates are measured using hammer excited vibrational tests. The spread of the properties of the components are hereby gained. Some of the components are selected to build up wooden assemblies which are evaluated first when they are screwed together and later when they are screwed and glued together. The focus is here on achieving representative finite element models of the junctions between the building parts composing the assemblies.
Online Access
Free
Resource Link
Less detail

Non Destructive Evaluation of Elastic Material Properties of Cross-Laminated Timber (CLT)

https://research.thinkwood.com/en/permalink/catalogue2315
Year of Publication
2008
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems