Unperturbed normal mode method for surface wave effects on acoustic propagation in a shallow water waveguide

2001 ◽  
Vol 110 (5) ◽  
pp. 2766-2766
Author(s):  
Frank S. Henyey ◽  
Eric I. Thorsos ◽  
Stephen A. Reynolds
Keyword(s):  
Surface Wave ◽  
Shallow Water ◽  
Normal Mode ◽  
Acoustic Propagation ◽  
Mode Method ◽  
Wave Effects ◽  
Normal Mode Method

An Approximate Normal Mode Method for Damped Lumped Parameter Systems

1967 ◽  
Vol 89 (4) ◽  
pp. 597-604 ◽  
Author(s):  
A. Seireg ◽  
L. Howard
Keyword(s):  
White Noise ◽  
Normal Mode ◽  
Damping Ratio ◽  
Conservative System ◽  
Random Excitation ◽  
Mass System ◽  
Response Data ◽  
Lumped Parameter ◽  
Mode Method ◽  
Normal Mode Method

An approximate normal mode method is introduced which permits any linear non-conservative system to be solved by super position of uncoupled coordinates. Accuracy of the method was found to be good when checked by digital computer for dynamic damper systems subjected to sinusoidal and white noise random excitation. A technique is presented which permits a mathematical model for a damped multimass system to be constructed entirely from experimentally obtained sinusoidal frequency response data. An expression is derived for optimum damping ratio and natural frequency ratio that will minimize the response of a two-mass system to white noise random excitation.

Unperturbed normal mode method for forward surface scattering

2008 ◽  
Vol 123 (5) ◽  
pp. 3086-3086
Author(s):  
Frank S. Henyey ◽  
Eric Thorsos
Keyword(s):  
Normal Mode ◽  
Surface Scattering ◽  
Mode Method ◽  
Normal Mode Method
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