Wave Induced Forces and Motions of Tubular Structures 



2.0 



1.6 



? 1-2 



0.8 



Q4 



PERIOD 1.45 SECONDS 

 o,« EXPERIMENT _ 



HAVELOCK 1954 



PRESENT WORK 



'0 0.1 Q2 03 0.4 0.5 0.6 07 

 WAVE HEIGHT , FT 



Fig, 4. Tension leg single cylinder 



of the circular cylinder and a quadratic drag coefficient of unity. 



Within the limits of experimental accuracy, the forces are 

 seen to vary linearly with wave height for a range of heights tested. 

 The two theoretical procedures are seen to give results of about 

 equal degree of conformity with experiments. 



Triangular Platform 1 in Regular Waves 



Experiments similar to those with a single cylinder were 

 next conducted with a complete platform model. This model was 

 similar to the one shown schematically in Fig. 3 except that the main 

 horizontal pontoons were of oval cross section and the above-water 

 deck was supported by a space frame arrangement of very small 

 vertical and inclined tubes. The dimensions of this model, referred 

 to as Model 1 , are given below: 



1103 



