DAMPING FACTOR OF PINUS SILVESTRIS TIMBERS IN LONGITUDINAL, TRANSVERSE AND TORSIONAL FREE VIBRATIONS

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ROOHNIA M.; HASHEMI TABALVANDANI S.M.; SHAFIEE P.; TAJDINI A.

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Paper Information

Journal: JOURNAL OF SCIENCES AND TECHNIQUES IN NATURAL RESOURCES Year:2011 | Volume:5 | Issue:4 Page(s): 19-30

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Title

DAMPING FACTOR OF PINUS SILVESTRIS TIMBERS IN LONGITUDINAL, TRANSVERSE AND TORSIONAL FREE VIBRATIONS

Author(s)

ROOHNIA M. | HASHEMI TABALVANDANI S.M. | SHAFIEE P. | TAJDINI A. | Issue Writer Certificate

Keywords

BEAMQ3

DAMPINGQ3

FLEXURALQ3

LOGARITHMIC DECREMENTQ3

PINEQ3

TORSIONALQ3

VIBRATIONQ3

Abstract

The effect of VIBRATION kind and direction on DAMPING properties of wood has been studied, taking into account the specimen width in rectangular wooden BEAMs of Silvestre PINE wood (Pinus silvestris). 39 sound and clear BEAMs with the dimensions of 36*4.5*2 cm (LRT) (wide specimens) made from Silvestre PINE wood were tested and DAMPING factor of the first mode was determined through LOGARITHMIC DECREMENT method in temporal field separately for longitudinal, FLEXURAL and TORSIONAL free VIBRATION tests. Then the specimens were cut to smaller specimens of 36*2*2 cm (LRT) (thin specimens) and then were tested in the same way as the initial wider specimens. There was no effect DAMPING of factor on width variation while different VIBRATION directions significantly affected this property. The greatest DAMPING size was of TORSIONAL and the smallest of longitudinal VIBRATION test. There was no difference between LR and LT FLEXURAL DAMPING factors. It has been predicted that in all VIBRATION directions, every dimension of the specimens (e.g. in-situ) could be used to evaluate the DAMPING factor of a proper piece of wood.

Cites

THE EFFECT OF JOINT TYPE ON ACOUSTICAL PROPERTIES OF JOINTED BEAMS

References

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APA: Copy

ROOHNIA, M., HASHEMI TABALVANDANI, S.M., SHAFIEE, P., & TAJDINI, A.. (2011). DAMPING FACTOR OF PINUS SILVESTRIS TIMBERS IN LONGITUDINAL, TRANSVERSE AND TORSIONAL FREE VIBRATIONS. JOURNAL OF SCIENCES AND TECHNIQUES IN NATURAL RESOURCES, 5(4), 19-30. SID. https://sid.ir/paper/362734/en

Vancouver: Copy

ROOHNIA M., HASHEMI TABALVANDANI S.M., SHAFIEE P., TAJDINI A.. DAMPING FACTOR OF PINUS SILVESTRIS TIMBERS IN LONGITUDINAL, TRANSVERSE AND TORSIONAL FREE VIBRATIONS. JOURNAL OF SCIENCES AND TECHNIQUES IN NATURAL RESOURCES[Internet]. 2011;5(4):19-30. Available from: https://sid.ir/paper/362734/en

IEEE: Copy

M. ROOHNIA, S.M. HASHEMI TABALVANDANI, P. SHAFIEE, and A. TAJDINI, “DAMPING FACTOR OF PINUS SILVESTRIS TIMBERS IN LONGITUDINAL, TRANSVERSE AND TORSIONAL FREE VIBRATIONS,” JOURNAL OF SCIENCES AND TECHNIQUES IN NATURAL RESOURCES, vol. 5, no. 4, pp. 19–30, 2011, [Online]. Available: https://sid.ir/paper/362734/en

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