













0.0032 





1 



1 



1 1 1 1 1 1 







0.0030 



- 







k 







0.0028 



_ 







In SPECTRA GENERATED - 







0.0026 



- 







Jl DESIRED SPECTRA 



1 

 1 

 \ 





N 



I 



0.0024 

 0.0022 



- 









L^ 



0.0020 



- 







\ 





f 



0.0018 



- 







\\ 





M 













w 





H 



lU 



Q 



0.0016 



— 









1 





< 



0.0014 



~ 













r, 



0.0012 



- 







1 \'^ ^ 





ai 

 a 



Vi 



0.0010 



- 







V 

 // \\ 







0.0008 



- 











0.0006 



- 







/ V 







0.0004 

 0.0002 



- 





J- 



> 1 ! 1 |^**^T' '^— ♦ 







0.0 



0.2 



0.4 



0.6 0.8 1.0 1.2 1.4 1.6 

 FREQUENCY (Hz) 



Figure 7. Typical energy density versus frequency plots (model terms) for a 

 wave spectra; 13-sec, 12-ft waves 



160 180 



Figure 8. Typical model wave train time series, 13-sec, 12-ft test waves 



Chapter 3 Test Conditions and Procedures 



19 



