Experimental Mechanics

, Volume 13, Issue 3, pp 120–125 | Cite as

Vibrations of segmented shells

Paper discusses the results of an experimental and analytical program on the vibrations of segmented shells
  • M. Lashkari
  • V. I. Weingarten


An analytical and experimental investigation was performed to determine the natural frequencies and mode shapes of a cone-cylinder segmented shell. The finite-element technique was used to predict the natural frequencies and mode shapes of a clamped segmented shell. In the experimental phase of the program, the shell was excited by an electromagnet and the natural frequencies were determined with the aid of a microphone. Holographic interferometry was used to identify the mode shapes for each resonant frequency. The analytical and experimental results were in good agreement with one another.


Mechanical Engineer Fluid Dynamics Experimental Investigation Resonant Frequency Mode Shape 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



coefficient of thei-th term in the assumed displacement field


number of circumferential waves


number of meridional half-waves


i-th generalized coordinate

\(\dot q_i\)

velocity ofq i


shell meridional coordinate


time, sec


kinetic energy of the shell, in.-lb


meridional displacement of the shell, in.


strain energy of the shell, in.-lb


circumferential displacement of the shell, in.


normal displacement of the shell, in.


work of the conservative, external loading, in.-lb


shell circumferential coordinate


angle between axis of revolution and normal to shell, rad


natural frequency, rad/sec


rotation of the middle surface


shell-stiffness matrix


shell-inertia matrix


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Copyright information

© Society for Experimental Mechanics, Inc. 1973

Authors and Affiliations

  • M. Lashkari
    • 1
  • V. I. Weingarten
    • 2
  1. 1.Department of Mechanical EngineeringAryamehr University of TechnologyTehranIran
  2. 2.Department of Civil EngineeringUniversity of Southern CaliforniaLos Angeles

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