engleski

The Transient Behaviour of Marine Cables During Laying Operations at Regular Waves in Two Dimensions

A numerical approach for predicting motion and tension of marine cables during laying operations in regular waves is presented. The problem of a cable ship in waves isconsidered, both during acceleration and deceleration stages. The solution methodology consists of dividing cable into straight elements, which must satisfy equilibrium equation and compatibility relations. The system of obtained nonlinear differential equations is solved by Runge-Kutta method, taking explicitly into account the effect of regular waves. Illustrative applications of the method are given for a cable-lying ship of approximately 100 m length, designed to properly install and repair submarine cable systems. The results are presented as cable tension transfer function for different types of cable and ship velocity-heading combination. The cable element angles, cable configuration and tangential and normal cable top force are presented.

cable lying dynamics; seakeeping; regular sea

nije evidentirano