Exact mathematical solution for nonlinear free transverse vibrations of beams

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Asadi Dalir M.

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Journal Paper

Paper Information

Journal: Scientia Iranica Year:2020 | Volume:27 | Issue:3 (Transactions B: Mechanical Engineering) Page(s): 1290-1301

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Title

Exact mathematical solution for nonlinear free transverse vibrations of beams

Author(s)

Asadi Dalir M. | Issue Writer Certificate

Keywords

Exact mathematical solution

Geometrically nonlinear terms

Deformed coordinates

Beam

Mode shape

Abstract

In the present paper, an Exact mathematical solution is obtained for the nonlinear free transverse vibration of Beams for the rst time. The governing nonlinear partial di erential equation in un-Deformed coordinates system is converted in two coupled partial di erential equations in Deformed coordinates system. Then, a mathematical explanation is obtained for the nonlinear Mode shapes as well as natural frequencies versus geometrical and material properties of the Beam. It is shown that as the sth mode of transverse vibration is excited, the 2sth mode of the in-plane vibration will be developed. The results of the present work is compared with those obtained by the Galerkin method and the observed agreement will con rm the Exact mathematical solution. It is shown that the governing equation is linear in the time domain. As a parameter, amplitude to length ratio ( =l) is proposed to show when the nonlinear terms become dominant in the behavior of structure.

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APA: Copy

Asadi Dalir, M.. (2020). Exact mathematical solution for nonlinear free transverse vibrations of beams. SCIENTIA IRANICA, 27(3 (Transactions B: Mechanical Engineering)), 1290-1301. SID. https://sid.ir/paper/973690/en

Vancouver: Copy

Asadi Dalir M.. Exact mathematical solution for nonlinear free transverse vibrations of beams. SCIENTIA IRANICA[Internet]. 2020;27(3 (Transactions B: Mechanical Engineering)):1290-1301. Available from: https://sid.ir/paper/973690/en

IEEE: Copy

M. Asadi Dalir, “Exact mathematical solution for nonlinear free transverse vibrations of beams,” SCIENTIA IRANICA, vol. 27, no. 3 (Transactions B: Mechanical Engineering), pp. 1290–1301, 2020, [Online]. Available: https://sid.ir/paper/973690/en

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