Initial Values for the Integration Scheme to Compute the Eigenvalues for Propagation in Ducts

Author

Walter Eversman, Missouri University of Science and TechnologyFollow

Abstract

It has been found that in the integration method for calculating the eigenvalues for propagation in two-dimensional ducts with flow care must be taken not to exclude roots which in the hardwall case are at infinity. When the real part of the wall admittance is positive starting values for the integration procedure to obtain these extra eigenvalues can be obtained by a limiting case analysis. When the imaginary part of the admittance is negative it appears that all the roots can be accounted for by the usual hardwall initial values κn b = nπ. © 1977.

Recommended Citation

W. Eversman, "Initial Values for the Integration Scheme to Compute the Eigenvalues for Propagation in Ducts," Journal of Sound and Vibration, Elsevier, Jan 1977.

The definitive version is available at https://doi.org/10.1016/0022-460X(77)90559-4

Department(s)

Mechanical and Aerospace Engineering

International Standard Serial Number (ISSN)

0022-460X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1977 Elsevier, All rights reserved.

Publication Date

01 Jan 1977