DOI QR코드

DOI QR Code

Formulae for the frequency equations of beam-column system carrying a fluid storage tank

  • El-Sayed, Tamer. A. (Department of Mechanical Design, Faculty of Engineering, Mataria, Helwan University) ;
  • Farghaly, Said. H. (Department of Mechanical Design, Faculty of Engineering, Mataria, Helwan University)
  • 투고 : 2018.12.29
  • 심사 : 2019.09.12
  • 발행 : 2020.01.10

초록

In this work, a mathematical model of beam-column system carrying a double eccentric end mass system is investigated, and solved analytically based on the exact solution analysis. The model considers the case in which the double eccentric end mass is a rigid storage tank containing fluid. Both Timoshenko and Bernoulli-Euler beam bending theories are considered. Equation of motion, general solution and boundary conditions for the present system model are developed and presented in dimensional and non-dimensional format. Several important non-dimensional design parameters are introduced. Symbolic and/or explicit formulae of the frequency and mode shape equations are formulated. To the authors knowledge, the present reduced closed form symbolic and explicit frequency equations have not appeared in literature. For different applications, the results are validated using commercial finite element package, namely ANSYS. The beam-column system investigated in this paper is significant for many engineering applications, especially, in mechanical and structural systems.

키워드

참고문헌

  1. Abbas, B. (1984), "Vibrations of Timoshenko beams with elastically restrained ends", J. Sound Vib., 97(4), 541-548. https://doi.org/10.1016/0022-460X(84)90508-X.
  2. Abramovich, H. (1992), "Natural frequencies of Timoshenko beams under compressive axial loads", J. Sound Vib., 157(1), 183-189. https://doi.org/10.1016/0022-460X(88)90397-5.
  3. Badran, O., Gaith, M.S. and Al-Solihat, A. (2012), "The vibration of partially filled cylindrical tank subjected to variable acceleration", Engineering, 4(09), 540. http://dx.doi.org/10.4236/eng.2012.49069.
  4. Bokaian, A. (1988), "Natural frequencies of beams under compressive axial loads", J. Sound Vib., 126(1), 49-65. https://doi.org/10.1016/0022-460X(88)90397-5.
  5. Cowper, G. (1966), "The shear coefficient in Timoshenko's beam theory", J. Appl. Mech., 33(2), 335-340. https://doi.org/10.1016/0022-460X(83)90511-4.
  6. Demirdag, O. and Yesilce, Y. (2011), "Solution of free vibration equation of elastically supported Timoshenko columns with a tip mass by differential transform method", Adv. Eng. Software, 42(10), 860-867. https://doi.org/10.1016/j.advengsoft.2011.06.002.
  7. El-Sayed, T. and Farghaly, S. (2018), "Frequency equation using new set of fundamental solutions with application on the free vibration of Timoshenko beams with intermediate rigid or elastic span", J. Vib. Control, 24(20), 4764-4780. https://doi.org/10.1177/1077546317734102.
  8. El-Sayed, T.A. and Farghaly, S.H. (2016), "Exact vibration of Timoshenko beam combined with multiple mass spring sub-systems", Struct. Eng. Mech., 57(6), 989-1014. http://dx.doi.org/10.12989/sem.2016.57.6.989.
  9. El-Sayed, T.A. and Farghaly, S.H. (2017), "A normalized transfer matrix method for the free vibration of stepped beams: comparison with experimental and FE (3D) methods", Shock Vib., 2017. https://doi.org/10.1155/2017/8186976.
  10. Farghaly, S. and El-Sayed, T. (2016), "Exact free vibration of multi-step Timoshenko beam system with several attachments", Mech. Syst. Signal Process, 72, 525-546. https://doi.org/10.1016/j.ymssp.2015.11.025.
  11. Farghaly, S. and Shebl, M. (1995), "Exact frequency and mode shape formulae for studying vibration and stability of Timoshenko beam system", J. Sound Vib., 180(2), 205-227. https://doi.org/10.1006/jsvi.1995.0075.
  12. Farghaly, S.H. (1992), "Bending vibrations of an axially loaded cantilever beam with an elastically mounted end mass of finite length", J. Sound Vib., 156(2), 373-380. https://doi.org/10.1016/0022-460X(92)90706-4.
  13. Feodosyev, V. (1983), Selected problems and Questions in Strength of Materials, Mir Publishers, Russia. 430.
  14. Grossi, R.O. and Laura, P.A.A. (1982), "Further results on a vibrating beam with a mass and spring at the end subjected to an axial force", J. Sound Vib., 84(4), 593-594. https:///doi.org/10.1016/S0022-460X(82)80039-4.
  15. Huang, T. (1961), "The effect of rotatory inertia and of shear deformation on the frequency and normal mode equations of uniform beams with simple end conditions", J. Appl. Mech., 28(4), 579-584. https://doi.org/10.1115/1.3641787.
  16. Ibrahim, R.A. (2005), Liquid Sloshing Dynamics: Theory and Applications, Cambridge University Press, United Kingdom.
  17. Kanaka Raju, K. and Venkateswara Rao, G. (1984), "Vibration, stability and frequency-axial load relation of short beams", J. Sound Vib., 95, 426-429. https://doi.org/10.1016/0022-460X(84)90682-5.
  18. Kounadis, A.N. (1980), "On the derivation of equations of motion for a vibrating Timoshenko column", J. Sound Vib., 73(2), 177-184. https://doi.org/10.1016/0022-460X(80)90687-2.
  19. Malaeke, H. and Moeenfard, H. (2016), "Analytical modeling of large amplitude free vibration of non-uniform beams carrying a both transversely and axially eccentric tip mass", J. Sound Vib., 366, 211-229. https://doi.org/10.1016/j.jsv.2015.12.003.
  20. Rezaiee Pajand, M., Aftabi Sani, A., Hozhabrossadati, S.M.J.S.S. and Systems (2018), "Vibration suppression of a double-beam system by a two beam system by a two-degree-of-freedom mass-spring system", 21. https://doi.org/10.12989/sss.2018.21.3.349.
  21. Sato, K. (1991), "Vibration and stability of a clamped-elastically restrained timoshenko column under nonconservative load", JSME International Journal Series Iii-Vibration Control Engineering Engineering for Industry, 34(4), 459-465. https://doi.org/10.1299/jsmec1988.34.459
  22. Stephen, N. (1989), "Beam vibration under compressive axial load--- upper and lower bound approximation", J. Sound Vib., 131, 345-350. https://doi.org/10.1016/0022-460X(89)90498-7.
  23. Takahashi, K. (1980), "Eigenvalue problem of a beam with a mass and spring at the end subjected to an axial force", J. Sound Vib., 71(3), 453-457. https://doi.org/10.1016/0022-460X(80)90427-7.
  24. Timoshenko, S.P. (1922), "X. On the transverse vibrations of bars of uniform cross-section", The London, Edinburgh, and Dublin Philosophical Mag. J. Sci., 43(253), 125-131. https://doi.org/10.1080/14786442208633855.