APPENDIX F 

 PHYSICAL PROPERTIES OF SEVERAL FLOATING BREAKWATERS 



1. Proposed Oak Harbor Floating Breakwater (Davidson, 1971) . 



a. Physical Properties . 



m = mass per unit length = 25.1 slug/ ft 



2 

 I = mass moment o£ inertia = 621 slug-£t /ft 



X = X- coordinate of center of gravity = 0.0 ft. 

 (on centerline) 



y = y-coordinate of center of gravity = -2.34 ft (below WL) 

 KH22 =64.5 Ib/ft/ft 

 KH^^ = ^'^^^ ft- lb/ft 

 All other KH. . = 



b. Mooring Line Tension Response (change per unit displacement). 



^ = 1,170 lb/ft 



Ax 



— = 281 lb/ft 



Ay 



^ = 1,710 lb 



AO 



c. Computed Mooring Spring Constants (depth = 29.5 feet) 



KM^^ = 119 lb/£t/ft 



KM^2 = -^-^^ lb/ft/ ft 



KM = 166 lb/ft 



KM^j =' -5.73 Ib/ft/ft 



KM22 = 10.2 Ib/ft/ft 



KM23 = -3.37 lb/ft 



KMjj = 160 lb/ft 



KM32 = 2.06 lb/ft 



156 



