Page 43 - Rekayasa Pantai

T  1 sin 2 . t  sin 2 t 
=   − +  dt
O  2 k 2 k 2 

LT
= (3.20)
2

 sin 2 (kx − t ) dtdx. = 1  ( 1− cos ( 2 kx − t  ) dtdx.
2

1 T  sin 2 (kx −  ) t  L
=   x −  dt
2 O  k 2  O

LT
= (3.21)
2

 LT
1 a 2 w 2 h  sinh 2 kh 
E =  
k
2 sinh 2 kh 2 2   h k 

  2 2 sinh khcosh kh
= a 2 LT
8 sinh 2 kh k

fg  2
= a 2 LT
8 gk tanh kh


= H 2 LT (3.22)
16

Kerapatan Energi :

1     H 2
E =  H 2 LT = (3.23)

k
LT  16  16

Energi Potensial :

L T 1
E p =    2 dx. dt
O O 2

31