A Method for Calculating the Dynamics of Rotating Flexible Structures, Part 2: Example Calculations

[+] Author and Article Information
D. J. Segalman, C. R. Dohrmann

Structural Dynamics and Controls Department, Sandia National Laboratories, Albuquerque, NM 87185

A. M. Slavin

Solid and Structural Mechanics Department, Sandia National Laboratories, Albuquerque, NM 87185

J. Vib. Acoust 118(3), 318-322 (Jul 01, 1996) (5 pages) doi:10.1115/1.2888184 History: Received December 01, 1993; Online February 26, 2008


The problem of calculating the vibrations of rotating structures has challenged analysts since the observation that use of traditional modal coordinates in such problems leads to the prediction of instability involving infinite deformation when rotation rates exceed the first natural frequency. A method using a system of nonlinearly coupled deformation modes to analyze rotating general, linear (unjointed) structures that addresses the problem of erroneously predicting infinite deformations has been presented in a preceding paper (Segalman and Dohrmann, 1995). This technique is employed to address several types of problems ranging from simple beams to an inflated membrane structure. Some of the details of exploiting existing finite element codes to evaluate the relevant matrices are also developed.

Copyright © 1996 by The American Society of Mechanical Engineers
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