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Vibration analysis of cylindrical shells by several finite difference schemes

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Author
Ball, Robert E.
Date
1971-06
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Abstract
Several finite differencing schemes are used to compute the natural frequencies and mode shapes of simply supported circular cylindrical shells in an attempt to determine the most accurate numerical mode. Sets of difference equations are developed from the governing differential field equations and by minimizing the finite difference form of the Lagrangian energy function. Both finite differences and trigonometric expansions are used to model the circumferential behavior. Staggered or half-stations are used in addition to the conventional differencing schemes. The results indicate that the schemes using the trigonometric expansions are generally more accurate than those using finite differences for the circumferential derivatives. Furthermore, the conventional differencing scheme is shown to be as accurate as the half-station scheme when the field equation approach is used in conjunction with the trigonometric expansions
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
URI
http://hdl.handle.net/10945/29141
NPS Report Number
NPS-57BP7161A
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