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Vibration and Damping of Thin-Walled Cylinders


Watts, George Arthur (1962) Vibration and Damping of Thin-Walled Cylinders. Engineer's thesis, California Institute of Technology. doi:10.7907/XPER-7Q77.


The frequencies of normal modes of free vibration of three cylinders of different thickness were found experimentally. For some of the modes damping was also found. The modes excited were of a single axial half wave and multiple circumferential waves.

The shells were geometrically similar except for thickness and were made by electroplating copper on accurately machined wax mandrels. Melting the wax produced shells of very uniform thickness without seams.

The modes and frequencies agreed to within 10% of the theoretical values for cylinders with fixed ends, except at small numbers of waves where they agreed more closely with the theoretical values for freely supported ends. The damping factors tended toward a small constant value with increasing numbers of waves above the mode with fundamental frequency, but increased rapidly as the numbers of waves decreased below the fundamental.

Item Type:Thesis (Engineer's thesis)
Subject Keywords:Aeronautical engineering
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Aeronautics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Fung, Yuan-cheng
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1962
Record Number:CaltechETD:etd-12072005-132350
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4830
Deposited By: Imported from ETD-db
Deposited On:08 Dec 2005
Last Modified:21 Dec 2019 01:25

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PDF (Watts_ga_1962.pdf) - Final Version
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