发明名称 |
Method for determining the approximate resonance frequency of a structure surrounded by a compressible fluid |
摘要 |
A method for determining the approximate resonance frequency of a structure surrounded by a compressible fluid includes the steps of: (1) performing analysis to determine in-vacuo frequencies and mode shapes of the structure; (2) selecting an in-vacuo mode of interest, (3) computing an influence matrix at the eigenfrequency of the selected mode of interest; (4) combining the computed influence matrix with structural stiffness and mass matrices from a finite element program, and using the modified matrices computing eigenvalues of the structure, including eigenvectors; (5) selecting from the computed eigenvectors a computed mode having substantially the same displaced shape as the in-vacuo mode of interest; (6) determining the eigenfrequency of the selected computed mode; (7) determining any difference between the computed eigenfrequency of the selected computed mode and the in-vacuo eigenfrequency of the selected in-vacuo mode of interest. The process iteratively returns to step (3) until the eigenvalues of the selected computed mode of step (5) and the in-vacuo eigenvalue substantially converge.
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申请公布号 |
US5686667(A) |
申请公布日期 |
1997.11.11 |
申请号 |
US19960641019 |
申请日期 |
1996.04.15 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY |
发明人 |
MCCOLLUM, MICHELE D.;SIDERS, CLEMENTINA M. |
分类号 |
G01H13/00;(IPC1-7):G01H13/00 |
主分类号 |
G01H13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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