ANALYSES OF MULTIPLE- FLOAT-SUPPORTED 

 PLATFORMS IN WAVES 



C .H. Kim and J. A. Mercier 



Stevens Institute . of Technology 

 Davidson Laboratory 

 Castle Point Station 

 Hoboken 3 New Jersey 3 U.S.A. 



ABSTRACT 



Results of several studies of the behavior of floating 

 platforms in waves are presented. The contents of 

 these studies may be briefly summarized : 

 MOTIONS RESPONSE OF A RELATED SERIES OF 

 THREE AND FOUR FLOAT PLATFORMS 

 Transfer functions relating heave and pitch motions 

 to incident waves have been used together with assum- 

 ed (Pierson-Moskowitz) wave spectra to derive di- 

 mensionless spectral response information for these 

 motions in waves as a function of significant wave 



1/3 



height divided by (displaced volume) ' . The depend- 

 ence on float slenderness, damping plate (or footing) 

 size and metacentric height are presented in Figures 

 and Tables. 



SOME PROBLEMS OF THE HYDRODYNAMIC INTER- 

 ACTION BETWEEN TWO FLOATING BODIES IN 

 BEAM SEAS 



An analysis is given of both wave- and motion-induc- 

 ed forces and moments on the individual bodies of a 

 rigidly - connected twin - cylindrical body floating in 

 beam seas. The influence of the hydrodynamic inter- 

 action effect on the sway-exciting force was found to 

 be quite remarkable . The diffracted and radiated waves 

 were evaluated and related to wave and damping forces 

 and moments. 



Numerical calculations were carried out of some 

 hydrodynamic characteristics of interaction between 

 two different cylindrical bodies floating in proximity 

 in beam seas. 



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