Transverse vibrations induced by longitudinal excitation in beams with geometrical and loading imperfections

Si Mohamed Sah*, Jon Juel Thomsen, Dmitri Tcherniak

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

With structural health monitoring techniques based on measuring transverse vibrations of beam-like components it can be difficult to provide transverse excitation, while longitudinal excitation can be easier. We experimentally investigate how transverse vibrations in a beam can be excited by a longitudinal hammer impact. We carry out a comparative study on the measured transverse natural frequencies and frequency response coherence for different input and output locations and directions. It is shown that transverse vibrations are excited regardless of the impact locations and directions. Theoretical explanation to this counter-intuitive phenomenon is provided in terms of various imperfections associated with beams and impacts.
Original languageEnglish
JournalJournal of Sound and Vibration
Volume444
Pages (from-to)152-160
ISSN0022-460X
DOIs
Publication statusPublished - 2019

Keywords

  • Beam imperfection
  • Impact imperfection
  • Longitudinal impact
  • Transverse vibrations

Cite this

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title = "Transverse vibrations induced by longitudinal excitation in beams with geometrical and loading imperfections",
abstract = "With structural health monitoring techniques based on measuring transverse vibrations of beam-like components it can be difficult to provide transverse excitation, while longitudinal excitation can be easier. We experimentally investigate how transverse vibrations in a beam can be excited by a longitudinal hammer impact. We carry out a comparative study on the measured transverse natural frequencies and frequency response coherence for different input and output locations and directions. It is shown that transverse vibrations are excited regardless of the impact locations and directions. Theoretical explanation to this counter-intuitive phenomenon is provided in terms of various imperfections associated with beams and impacts.",
keywords = "Beam imperfection, Impact imperfection, Longitudinal impact, Transverse vibrations",
author = "Sah, {Si Mohamed} and Thomsen, {Jon Juel} and Dmitri Tcherniak",
year = "2019",
doi = "10.1016/j.jsv.2018.12.027",
language = "English",
volume = "444",
pages = "152--160",
journal = "Journal of Sound and Vibration",
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publisher = "Elsevier",

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Transverse vibrations induced by longitudinal excitation in beams with geometrical and loading imperfections. / Sah, Si Mohamed; Thomsen, Jon Juel; Tcherniak, Dmitri.

In: Journal of Sound and Vibration, Vol. 444, 2019, p. 152-160.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Transverse vibrations induced by longitudinal excitation in beams with geometrical and loading imperfections

AU - Sah, Si Mohamed

AU - Thomsen, Jon Juel

AU - Tcherniak, Dmitri

PY - 2019

Y1 - 2019

N2 - With structural health monitoring techniques based on measuring transverse vibrations of beam-like components it can be difficult to provide transverse excitation, while longitudinal excitation can be easier. We experimentally investigate how transverse vibrations in a beam can be excited by a longitudinal hammer impact. We carry out a comparative study on the measured transverse natural frequencies and frequency response coherence for different input and output locations and directions. It is shown that transverse vibrations are excited regardless of the impact locations and directions. Theoretical explanation to this counter-intuitive phenomenon is provided in terms of various imperfections associated with beams and impacts.

AB - With structural health monitoring techniques based on measuring transverse vibrations of beam-like components it can be difficult to provide transverse excitation, while longitudinal excitation can be easier. We experimentally investigate how transverse vibrations in a beam can be excited by a longitudinal hammer impact. We carry out a comparative study on the measured transverse natural frequencies and frequency response coherence for different input and output locations and directions. It is shown that transverse vibrations are excited regardless of the impact locations and directions. Theoretical explanation to this counter-intuitive phenomenon is provided in terms of various imperfections associated with beams and impacts.

KW - Beam imperfection

KW - Impact imperfection

KW - Longitudinal impact

KW - Transverse vibrations

U2 - 10.1016/j.jsv.2018.12.027

DO - 10.1016/j.jsv.2018.12.027

M3 - Journal article

VL - 444

SP - 152

EP - 160

JO - Journal of Sound and Vibration

JF - Journal of Sound and Vibration

SN - 0022-460X

ER -