4 - Memorial University of Newfoundland DAI

3.2 WavcThemics ........................... 25
3.3 Ilcg~~lar Wave Forces ....................... 26
3.3.1 Vertical Cylindl ...................... 26
3.3.2 Arbitrarily Oricntsd Cylinder .............. 34
3.4 Irregalnr Wwc lmn ....................... 31
3.5 Mathematical Modelling of the Structure ............ 38
3.5.1 Wrmulationr for the 3-D Model ............. 39
3.5.2 Wrrnulations for the Slick Model ............ 42
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3.6 Computer lmplen~enlatian of Analytical Models 46
3.6.1 Implementation of the 3-D Model ............ 48
3.6.2 Implcmontation of the Stick Model ........... 53
4 Physical Modelling 67
4.1 Dovelapmcnt of Modelling Laws ................. 57
4.2 WmModolling .......................... 59
4.3 Modelling the Sea Structure Interaction ............ 61
4.4 Mdelling the Tower ....................... 68
4.5 Difficulties Awciated with HydmElastic Modelling ...... 68
4.5.1 Difficulties due to Fmude's Law of Similarity ...... 69
4.5.2 Difficulties due to the Interaction between Inertia in
the Structure and in the Liquid ............. TO
4.5.3 Difficultindue toViscoity-Forces and Sttuctural Damp-
ing ............................. 13
4.6 Model Design and Pabkbrieation .................. 14
4.6.1 Doseription of the Prototype ............... 14
4.6.2 Design olTlne Reduced Model .............. 80