Natural frequencies and modes of a Timoshenko beam

Abstract In this paper, we present a systematic approach to solving the eigenvalue problems associated with the uniform Timoshenko beam model. Properties of the natural frequencies and modes are discussed for the pinned–pinned and cantilever beam, e.g., double eigenvalues, estimates for small and large eigenvalues, significance of dimensionless parameters and remarkable mode shapes. Our results expand on and complement existing results.

[1]  J. U. Kim,et al.  Boundary control of the Timoshenko beam , 1987 .

[2]  Marianna A. Shubov,et al.  Asymptotic and Spectral Analysis of the Spatially Nonhomogeneous Timoshenko Beam Model , 2002 .

[3]  T. Huang,et al.  The Effect of Rotatory Inertia and of Shear Deformation on the Frequency and Normal Mode Equations of Uniform Beams With Simple End Conditions , 1961 .

[4]  Fred B. Seely,et al.  Advanced Mechanics of Materials , 1932 .

[5]  Stephen P. Timoshenko,et al.  Vibration problems in engineering , 1928 .

[6]  Matthew P. Coleman,et al.  Analysis of vibration spectrum of a Timoshenko beam with boundary damping by the wave method , 1993 .

[7]  Eberhard Zeidler,et al.  Applied Functional Analysis: Applications to Mathematical Physics , 1995 .

[8]  Eric E. Ungar,et al.  Mechanical Vibration Analysis and Computation , 1989 .

[9]  Y. Fung Foundations of solid mechanics , 1965 .

[10]  J. McLaughlin,et al.  Double eigenvalues for the uniform Timoshenko beam , 1997 .

[11]  C. Dolph On the Timoshenko theory of transverse beam vibrations , 1954 .

[12]  A. J. van der Merwe,et al.  A Timoshenko beam with tip body and boundary damping , 2004 .

[13]  Bruce Geist,et al.  Eigenvalue formulas for the uniform Timoshenko beam: the free-free problem , 1998 .

[14]  Günter Leugering,et al.  Control of planar networks of Timoshenko beams , 1993 .

[15]  S. E. Benzley,et al.  Book Reviews : FRACTURE AND FATIGUE CONTROL IN STRUCTURES S.T. Rolfe and J.M. Barsom Prentice-Hall, Inc., Englewood Cliffs, New Jersey , 1979 .

[16]  G. Cowper The Shear Coefficient in Timoshenko’s Beam Theory , 1966 .