Shallow water waveguide: Modal analysis of acoustic measurements taken on the New Jersey continental shelf

1990 ◽  
Vol 88 (S1) ◽  
pp. S29-S29
Author(s):  
Judith Bishop ◽  
James Doutt ◽  
William Carey
Keyword(s):  
New Jersey ◽  
Continental Shelf ◽  
Shallow Water ◽  
Modal Analysis ◽  
Acoustic Measurements

Shallow‐water transmission measurements taken on the New Jersey Continental Shelf

1991 ◽  
Vol 89 (4B) ◽  
pp. 1981-1981 ◽  
Author(s):  
William M. Carey ◽  
James Doutt ◽  
Lynn Maiocco Dillman
Keyword(s):  
New Jersey ◽  
Continental Shelf ◽  
Shallow Water ◽  
Transmission Measurements ◽  
Water Transmission

scholarly journals Measurement of shallow‐water sound transmission on the New Jersey continental shelf

1989 ◽  
Vol 86 (S1) ◽  
pp. S8-S8 ◽  
Author(s):  
Lynne Maiocco ◽  
William Carey ◽  
Edwin Parssinen ◽  
James Doutt
Keyword(s):  
New Jersey ◽  
Continental Shelf ◽  
Shallow Water ◽  
Sound Transmission

Shallow-water sound transmission measurements on the New Jersey continental shelf

1995 ◽  
Vol 20 (4) ◽  
pp. 321-336 ◽  
Author(s):  
William M. Carey ◽  
James Doutt ◽  
Richard B. Evans ◽  
Lynne M. Dillman
Keyword(s):  
New Jersey ◽  
Continental Shelf ◽  
Shallow Water ◽  
Sound Transmission ◽  
Transmission Measurements

scholarly journals Shallow water acoustics on the Canadian East Coast Continental Shelf

1988 ◽  
Vol 84 (S1) ◽  
pp. S150-S150
Author(s):  
Philip R. Staal ◽  
Steven J. Hughes ◽  
Dale D. Ellis ◽  
David M. F. Chapman
Keyword(s):  
Continental Shelf ◽  
Shallow Water ◽  
East Coast ◽  
Shallow Water Acoustics

Vibration Analysis for NDE of Ceramic Components

2021 ◽  
Author(s):  
Bernd Köhler ◽  
Kilian Tschöke ◽  
Mareike Stephan ◽  
Sergey Gartsev ◽  
Martin Barth
Keyword(s):  
Modal Analysis ◽  
Simultaneous Measurement ◽  
Vibration Analysis ◽  
Microphone Array ◽  
Acoustic Measurements ◽  
Laser Doppler Vibrometry ◽  
Mode Identification ◽  
Vibration Excitation ◽  
Ceramic Components ◽  
Signal Evaluation

Abstract In this contribution we study vibration testing for ceramic parts on the example of an electrolyte cup, used in a prospective power cells design. An adapted experimental arrangement for the vibration excitation and the acoustic measurements was built and tested. In parallel, extensive numerical modal analysis simulations were performed using ANSYS. The resonance spectra obtained by modelling agree with the experimentally determined spectra in such a way that the experimentally determined eigenfrequencies can be assigned to the cup modes. The correctness of this identification was verified by direct mode visualization with scanning laser doppler vibrometry. A much faster and potentially in-line capable method for experimental mode identification is the simultaneous measurement at several points using a microphone array and subsequent signal evaluation with operational modal analysis. This procedure was successfully tested. Features in the spectra connected with the presence of flaws are discussed. These features include the drop of some eigenfrequencies and the splitting of degenerated modes.

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