INVESTIGATION ON EFFECT OF ELASTIC SUPPORTS STIFFNESS ON NATURAL FREQUENCIES AND MODES OF TWO SPAN BEAMS UNDER FREE VIBRATION

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ZAKERI JABBARALI; SHAHBABAEI MOHAMMAD

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Journal: Journal of Transportation Engineering Year:2015 | Volume:7 | Issue:1 Page(s): 45-54

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Information Journal Paper

Title

INVESTIGATION ON EFFECT OF ELASTIC SUPPORTS STIFFNESS ON NATURAL FREQUENCIES AND MODES OF TWO SPAN BEAMS UNDER FREE VIBRATION

Author(s)

ZAKERI JABBARALI | SHAHBABAEI MOHAMMAD | Issue Writer Certificate

Keywords

ELASTIC SUPPORT OF BEAMQ2

FREE VIBRATIONQ2

NATURAL FREQUENCYQ2

MODE SHAPESQ2

SUPPORT STIFFNESSQ2

Abstract

Elastic bearings are used to improve the structural behavior of the bridges. The existence of such bearings has a considerable effect on the change of vibration behavior in bridges and beams; i.e. change of structures' natural frequencies and vibration modes. In technical texts, theoretical studies can be found on one-span bridges with elastic bearings and numerical methods are used for multi-span beams. In the present paper, the equations governing the vibration of two-span beams with elastic bearings under FREE VIBRATION were deduced and equation coefficients were calculated in Matlab environment. The results were compared with the simulation results in finite element software ANSYS. Finally, changes of natural frequencies and vibration modes with change of bearing stiffness and span length were investigated. The obtained results indicated that frequency changes in the first and second modes had a descending order for low stiffness; with the increase of stiffness, this change became almost constant. However, frequency increased continuously in higher modes. Moreover, in terms of performance, elastic bearings showed their best performance in equal spans.

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APA: Copy

ZAKERI, JABBARALI, & SHAHBABAEI, MOHAMMAD. (2015). INVESTIGATION ON EFFECT OF ELASTIC SUPPORTS STIFFNESS ON NATURAL FREQUENCIES AND MODES OF TWO SPAN BEAMS UNDER FREE VIBRATION. JOURNAL OF TRANSPORTATION ENGINEERING, 7(1), 45-54. SID. https://sid.ir/paper/224003/en

Vancouver: Copy

ZAKERI JABBARALI, SHAHBABAEI MOHAMMAD. INVESTIGATION ON EFFECT OF ELASTIC SUPPORTS STIFFNESS ON NATURAL FREQUENCIES AND MODES OF TWO SPAN BEAMS UNDER FREE VIBRATION. JOURNAL OF TRANSPORTATION ENGINEERING[Internet]. 2015;7(1):45-54. Available from: https://sid.ir/paper/224003/en

IEEE: Copy

JABBARALI ZAKERI, and MOHAMMAD SHAHBABAEI, “INVESTIGATION ON EFFECT OF ELASTIC SUPPORTS STIFFNESS ON NATURAL FREQUENCIES AND MODES OF TWO SPAN BEAMS UNDER FREE VIBRATION,” JOURNAL OF TRANSPORTATION ENGINEERING, vol. 7, no. 1, pp. 45–54, 2015, [Online]. Available: https://sid.ir/paper/224003/en

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