An eigenvector method to determine the transient response of cylindrical shells in a fluid with uniform axial flow
作者:
Peter R. Stepanishen,
D. D. Ebenezer,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1991)
卷期:
Volume 89,
issue 2
页码: 565-573
ISSN:0001-4966
年代: 1991
DOI:10.1121/1.400381
出版商: Acoustical Society of America
关键词: MECHANICAL VIBRATIONS;EIGENVECTORS;SHELLS;LOADING;CYLINDRICAL CONFIGURATION;INTEGRAL EQUATIONS
数据来源: AIP
摘要:
A general time domain approach is presented to evaluate the vibratory response of cylindrical shells in time‐invariant axial flows to broadband time‐dependent excitations. The approach is based on the use of aninvacuoeigenvector expansion with time‐dependent coefficients for the velocity field of the shell. A set of convolution integral equations are developed for the eigenvelocities that are coupled due to the fluid loading. These equations are similiar to those developed for planar vibrators and are readily solved by marching forward in time. The known terms in the equations are the ρcfluid‐loaded admittances of each eigenvector and the radition impulse responses. Since these are easily obtained, a large number of eigenvectors can be included in the analysis. Numerical results illustrating the responses of a simply supported cylindrical shell to an impulsive ring excitation are presented.
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