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TABLE OF CONTENTS 



Page 



ABSTRACT ,„ ... o .<,.,............<. o .o ... o.., o o , .................. .... 1 



INTRODUCTION ...... ..o ... . ......... ..................... 1 



DESCRIPTION OF MODEL AND PROTOTYPE ................ ..o <. = ...... o. = . o.... = o ... 2 



TEST TROCEDURES AND EQUIPMENT .............. 



RESULTS OF TESTS IN REGULAR WAVES .. .o ......... . 



RESULTS" OF TESTS IN IRREGULAR WAVES ........... 



SUHMRY. . 



REFERENCES ............ .................... 



LIST OF FIGURES 



Figure 1 - 1/40-Scale Model of NRL Alternate 1 Stable Platform Concept 



(FORDS). ............. ..8 



Figure 2 - Linearity Investigation of Various Motions in Regular Waves 



for the NRL Platform (FORDS ) 9 



Figure 3 - Heave Response in Regular Waves of Small Amplitude for the 



NRL Platform (FORDS). .......................................... 10 



Figure 4 - Pitch and Roll Responses in Regular Waves of Small Amplitude 



for the NRL Platform (FORDS).......... 11 



Figure 5 - Power Density Spectrum of Wave Height Used during Test to 



Simulate State 4 Seas 12 



Figure 6 - Power Density Spectrum of Pitch Angle for Condition 1 in a 



Head State 4 Sea. ,, ................................. ........... 12 



Figure 7 - Power Density Spectrum of Heave Acceleration for Condition 1 



in a Head State 4 Sea. ......................................... 13 



Figure 8 - Power Density Spectrum of Surge Acceleration for Condition 1 



in a Head State 4 Sea 13 



Figure 9 - Power Density Spectrum of Wave Height Used to Simulate State 6 



Sea for Condition 1 Head Sea Tests . ............................ 14 



Figure 10- Power Density Spectrum of Pitch Angle for Condition 1 in a 



Head State 6 Sea ............................................... 14 



Figure 11- Power Density Spectrum of Heave Acceleration for Condition 1 



in a Head State 6 Sea 15 



Figure 12- Power Density Spectrum of Surge Acceleration for Condition 1 



in a Head State 6 Sea. 15 



