Natural frequencies and mode shapes in zero-force members of a truss

Authors

  • Dan PÎRȘAN Babeș-Bolyai University, Faculty of Engineering, Piaţa Traian Vuia, nr. 1-4, 320085, Reşiţa, Romania, dan.parsan@ubbcluj.ro https://orcid.org/0000-0002-6447-3515
  • Zeno-Iosif PRAISACH Zeno-Iosif Praisach, Babeș-Bolyai University, Faculty of Engineering, Piaţa Traian Vuia, nr. 1-4, 320085, Reşiţa, Romania, zeno.praisach@ubbcluj.ro https://orcid.org/0000-0002-8613-8224

DOI:

https://doi.org/10.24193/subbeng.2021.1.9

Keywords:

trusses, zero-force member, natural frequency, mode shape

Abstract

Trusses are everywhere; they are used in bridges, antenna towers, cranes, even in parts of the International Space Station. And for good reason, they allow us to create strong structures while using materials in very efficient and cost-effective way. Trusses it is essentially a rigid structure made up of a collection of straight members. The type of truss depends on how the horizontal and diagonal beams are arranged.

References

Collins M.D., Michael P., Diagonal Compression Field Theory-A Rational Model for Structural Concrete in Pure Torsion, ACI Journal, Proceedings 71(8), Aug. 1974, pp. 396-408.

Praisach Z.I., Gillich G.R., Protocsil C., Muntean F., Evaluation of Crack Depth in Beams for Known Damage Location Based on Vibration Modes Analysis, Conference: Acoustics & Vibration of Mechanical Structures, Timisoara, Applied Mechanics and Materials, 430, 2013, pp. 90-94.

Al-Nahlawi K.A., Wight J.K., Experimental and Analytical Study in Shear for Lightly Reinforced Concrete Beams, Department of Civil Engineering, Report UMCE No. 89-7, University of Michigan, June 1989.

Gillich G.R, Praisach Z.I., Detection and Quantitative Assessment of Damages in Beam Structures Using Frequency and Stiffness Changes, Key Engineering Materials, 569, pp. 1013-1020, 2013.

Bratu P., Analiza Structurilor Elastice-Comportarea la acțiuni statice și dinamice, Editura Impuls, 2011.

Bratu P., Vibrațiile sistemelor elastice, Editura Tehnică, 2000.

Faraji M., Dardel M., Pashaei M.H., Natural Frequency, Mode Shape, Bukling and Post-Bukling Analysis of MEMS with Various Clamped Position, Journal of Science and Engineering, 1(2), 2013, pp. 103-120.

Marti P., Use Of Truss Models in Detailing, Annual Convention of the American Concrete Institute, Phoenix, Mar. 8, 1984, 24 p.

Irvine T., Natural Frequencies of Beams Subjected to a Uniform Axial Load, Revision C, vibrationdata.com, 2011.

Gillich G.R., Negru I., Protocsil C., Stanciu E., Minda P.F., Evaluarea integrității structurilor mecanice, Editura Eftimie Murgu, Reșița, 2018.

STUDIA UBB ENGINEERING, Volume 66 (LXVI), No. 1, November 2021

Downloads

Published

2021-11-09

How to Cite

PÎRȘAN, D., & PRAISACH, Z.-I. (2021). Natural frequencies and mode shapes in zero-force members of a truss. Studia Universitatis Babeș-Bolyai Engineering, 66(1), 94–99. https://doi.org/10.24193/subbeng.2021.1.9

Issue

Volume 66, No. 1, November 2021

Section

Articles

License

Copyright (c) 2021 Studia Universitatis Babeș-Bolyai Engineering

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Most read articles by the same author(s)

1 2 > >>