#include "Parameters.spec" 
Problem Description
    title = "PTO Dynamics"
    type = drifter

Analysis Parameters
    static-outer-iterations = 1000
    static-iterations       = 10000
    static-relaxation       = 0.1
    static-tolerance        = 0.01
    static-outer-tolerance  = 0.01
    static-outer-relaxation = 0.99

    duration                = TF
    time-step               = DT 
    dynamic-tolerance       = 1e-6
    dynamic-relaxation      = 1.0
    dynamic-iterations      = 20
    dynamic-integration     = temporal
    ramp-time               = 30.0


Environment
    rho            = 1025
    gravity        = 9.81
    x-current      = (0.0, .001) (DEPTH.0, .001) 

    x-wind         = WIND  /* design wind */
    depth          = DEPTH
    input-type     = random
    forcing-method = wave-follower
    x-wave = (AMP,PER,0.0)


Buoys
   buoy_LB      type = cylinder 
                d = 2.52         
                h = 1.12         m = 1473           Sw = 3.25
                Cdn = 1        Cdt = 1          Cdw = 0.54

   plate    type = cylinder
	        m = 1012  /*kg, results in 2000lb wet weight */
            d = 3.6
            h = .01
            Cdn = .1
            Cdt = 2.5
            Sw = 0

Connectors

   coupling     m = 1
		  wet = 9.8
		  Cdn = 0.001
		  d = 0.001

Materials 
 
   spectra_3_8     EA = 1.1e8       EI = 0.1       GJ = 0.1
                   m = .0713              
                   d = 0.009525     Cdt = 0.01      Cdn = 1.1

   tether          EA = TETHER_EA     EI = 0.1       GJ = 0.1
                   m = .0713        bt = PTO_DAMPING
                   d = 0.0254*.375  Cdt = 0.05      Cdn = 1.1
   
   spring          EA = 4.45*1.1e8       EI = 4.45*9e8        GJ = 500
                   m = 120/3.5           bt = 0
                   d = 0.0254*8.625      Cdt = 0.2      Cdn = 1.2

   pto             EA = 4.45*1.27e8       EI = 4.45*9e8        GJ = 500
                   m = 40.3/2             bt = 0
                   d = 0.0254*3           Cdt = 0.2      Cdn = 1.2
 
   tetherguide     EA = 4.45*1.35e8       EI = 4.45*9e8        GJ = 500
                   m = 50/2.6             bt = 0
                   d = 0.0254*18          Cdt = 0.2      Cdn = 1.2
 
    
    


Layout
   terminal = {
       buoy = plate    
   }

   segment = {    /* 1.5 meters of chain approximates bridle */
       length = TETHER_LENGTH
       material = stretchy_part
       nodes = (N_TETHER_NODES, 1.0)
   } 
   
   connector = coupling

   segment = {                        
       length = GUIDE_LENGTH
       material = tetherguide
       nodes = (26, 1.0)
   } 	

   segment = {                        
       length = PTO_LENGTH
       material = pto
       nodes = (20, 1.0)
   } 	

   segment = {                        
       length = SPRING_LENGTH
       material = tetherguide
       nodes = (35, 1.0)
   } 	

   terminal = {
       buoy = buoy_LB
   }

End