Ki-m and Mercier 



c/c c ratio of damping to critical damping coefficient 



DLF dynamic load factor 



EI deck rigidity 



F force 



f frequency, cycles per second 



g acceleration of gravity 



k wave number - "> I g = 2irj\ 



k'j added mass coefficient for float -attenuator in heave, Eq.(35) 



L a length of attenuator 



M moment 



m" total added mass in vertical direction 



m' element of added mass in vertical direction 



m^ added mass of attenuator in vertical direction 



m^ added mass of damping devices in vertical direction 



R radius of attenuator 

 a 



R radius to center of area of appendage, Eq.(43) 



R Q radius of float waterplane 



S sectional area of float body 



T draft of float 



W.k interaction effect of k tn float on vertical force due to waves 



3 on j th float of array, Eq. (4 7) 



x horizontal coordinate, along deck 



Z vertical force 



z vertical coordinate 



z e effective depth for evaluating wave acceleration for element of 

 added mass, Eq. (34) 



V displaced volume 



f wave elevation 



f wave amplitude 



f wave motion evaluated at depth corresponding to assumed 

 damping source 



860 



