TAILIEUCHUNG - Free vibration of both-ends clamped wooden beams: Is it potentially applicable as an in situ assessment method

Considerable errors caused by shear deflection and rotary inertia in both-ends clamped flexural vibration make the modulus of elasticity hardly obtainable in flexurally excited beams with similar ending conditions. As both-ends clamped beams and columns are necessarily quality controlled in situ within the building structures. | Turkish Journal of Agriculture and Forestry Turk J Agric For (2013) 37: 121-125 © TÜBİTAK doi: Research Article Free vibration of both-ends clamped wooden beams: is it potentially applicable as an in situ assessment method? 1, 1 1 2 1 Mehran ROOHNIA *, Abdolsaber YAGHMAEIPOUR , Yoshitaka KUBOJIMA , Ajang TAJDINI Department of Wood and Paper Science and Technology, Karaj Branch, Islamic Azad University, Karaj, Iran 2 Forestry and Forest Products Research Institute, Tsukuba 305-8687, Japan Received: Accepted: Published Online: Printed: Abstract: Considerable errors caused by shear deflection and rotary inertia in both-ends clamped flexural vibration make the modulus of elasticity hardly obtainable in flexurally excited beams with similar ending conditions. As both-ends clamped beams and columns are necessarily quality controlled in situ within the building structures, this study has attempted to identify some initial requirements for the dynamic responses of a sound both-ends clamped beam under flexural vibration. Accordingly, the dynamic responses of the both-ends clamped wooden beams in radial and tangential flexural vibration were compared to beams in a free-free condition while stepwise increasing axial compressions were applied to the beams. Both-ends clamped beams had the potential to be subjected to in situ longitudinal Young’s modulus evaluations. The strong correlations among both-ends clamped and free-free beams in terms of evaluated moduli verified the possibility. Key words: Assessment, beam, clamped, structure, vibration, Young’s modulus 1. Introduction Most wooden structural components in forms of beams and columns are situated in both-ends clamped conditions. In timber constructions, the load-bearing components may lose their efficiencies due to gradual deterioration or natural, biological, and mechanical damages. Frequent .

• Lâm nghiệp
• Free vibration
• Young’s modulus
• Clamped wooden beams
• Wooden structural
• X ray digital scanning
• Free vibration analysis
• Free and constrained model
• Delaminated composite beam
• Vibration of the delaminated beam
• Breathing of delamination
• A novel meshfree approach
• Free vibration and buckling analysi
• Thin laminated composite plates
• User defined parameters
• Free vibration and buckling analysis
• Cartesian Transformation Method
• Vietnam Journal of Mechanics
• Fuzzy finite element algorithm
• Response surface method for free vibration analysis of structure
• Free vibration analysis of structure
• Fuzzy mode shapes
• Fuzzy natural frequencies
• Free vibration analysis of four parameter
• Functionally graded plates accounting transverse shear mode
• Functionally graded material
• Four parameter law
• higher order shear deformation theory
• Free vibration analysis of multi directional functionally graded plates
• Multi directional functionally graded plates
• 3D isogeometric analysis
• The free vibration behavior
• Three dimensional elasticity theory
• Nonlocal theory
• Isogeometric analysis
• Porous nanoplates using Nurbs formulations
• Free vibration analysis of porous nanoplates
• Free vibration of sandwich composite plates
• Dynamic response of sandwich composite plates
• Auxetic honeycomb core
• Honeycomb core
• Mathematics – Physics
• Gradient auxetic plate
• Finite element method
• Gradient auxetic
• Free vibration and bending
• Free vibration of a cracked double beam carrying a concentrated mass
• Cracked double beam carrying a concentrated mass
• The double beam
• The free vibration
• Free vibration of a 2D FGSW beam based
• Shear deformation theory
• Vibration modes of the beam
• Skin layers of 2D FGM
• Power gradation laws
• Free vibration of bidirectional functionally
• Buckling of bidirectional functionally graded sandwich plates
• Efficient Q9 element
• Linked interpolation
• Vibration and buckling analysis
• Mechanical sciences
• Scaled piping system
• Vibration attenuation via locally
• Resonant bandgap formation
• Finite element model updating
• Free and forced vibration testing
• Journal of Science and Technology
• Bending and free vibration analysis
• Functionally graded plates
• New eightunknown shear deformation theory
• Determination of mode shapes
• Multiple cracked beam element
• Application for free vibration analysis
• Multi span continuous beam
• Numerical analysis of free vibration
• Cross ply thick laminated composite cylindrical shells
• Continuous element method
• The dynamic transfer matrix
• The node based smoothed finite element method
• Free vibration problems
• The proposed formulation
• No spurious non zero energy modes
• New finite element for free vibration analysis
• Stiffened composite plates
• Arbitrarily oriented stifeners
• Mesh lines along the stiffeners
• Triangular cut out
• Laminated composite plate
• Eight nodded element
• Parametric design language code
• Static and free vibration of the sandwich folded plate
• The sandwich folded plate using the Layerwise theory
• The sandwich folded plate modeled by layer wise
• Discrete shear gap method
• The first order shear deformation theory
• Composite laminated plates
• Bending problems
• Composite plates using the C0 HSDT
• In plane rotations
• Rectangle plate
• Varying thickness
• Phase field theory
• Free vibration of rectangular plates
• Third order shear deformation theory
• Bending analysis
• Sandwich plate
• Auxetic material
• Modified couple stress theory
• Refined third order beam theory
• Nonlinear elastic foundation
• Nonlinear free vibration
• Hamilton’s principle
• Cross ply composite joined conical conical conical shells
• Dynamics stiffness matrix
• The finite element method
• Timoshenko beam theory
• The natural frequencies obtained
• Two directional functionally graded material