Gerassimov 3 Pershitz and Rakhmanin 



Here coefficients c£ t and C^,, are chosen in conformity with 

 recommendations of Ref. [2] , and C^ irn is determined by the 

 expression 



c- = -^r c° u SaL 3 , (12) 



hm 64 hr; 



established under the assumption that the centre of ship's rotation in 

 the horizontal plane coincides with the athwartship plane. The second 

 terms of formulae (11) allow for the presence of current 



V 



t = V Cos ( a + ), V„ = V Sin( a + (3 ). (13) 

 ? o o '00 



6. Estimation of tension of the anchor chain 



At an arbitrary moment of time the longitudinal axis O^ £ 

 forms an angle ( + (? ) with the anchor chain sagging plane (Fig. 1 ) 

 Projections of tension T for the latter on the body axis will be 

 expressed by the relationships 



P = T Cos ( + V ), 



P T = T Sin ( + <P ). (14) 



The moment of force T about the central vertical axis appears to 

 be equal to 



M T = T • i hh Sin ( + <p ) - T. vhh -Cos ( £ + <p ). (15; 



The horizontal component of the anchor chain tension is represented 

 by the sum 



T = T + A T (16) 



o 



Here T is taken as 

 o 



T ■ c U"hr- v 2 . < 17 > 



o a£ 2 



1086 



