1.0 











































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t'\ 



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RMS- 2.28" / 













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2 n 



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FfleOUENCY IN CPS 



0.5 0.6 0.7 0.8 0.9 1.0 



Figure 12 - Spectral Analysis of Waves Produced with Actuator Installation 

 to Simulate Neumann Spectrum with Peak Frequency of 0.5 CPS 























/A 





/\ 















/ ^ 



1 / 



/ V 



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RMS =2.34- 



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RMS = 1.28" 



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AMPLITUDE' 0.877 





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k 









• 

 • 

 • 



PROBE 160 FT FROM WAVEMAKERS 

 BLOWER SPEED = 1400 RPM 





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FREQUENCY IN CPS 



O** 05 0,6 0.7 O.e 09 1.0 



Figure 13 - Change in Wave Spectral Shape Because of 50-Percent 

 Reduction of Excitation Level of .Actuators Using Input Program 

 with Flat Frequency Characteristics 



15 



