심해용 무인잠수정 케이블의 비선형 동적해석

Abstract

cean developments gradually move to deep-sea in the 21 century. A deep-sea unmanned underwater vehicle(UUV) is one of important tools for ocean resource survey. A marine cable plays an important role of the safe operation of a deep-sea UUV. An umbilical cable of a deep-sea UUV is excited by surface vessel motion and shows nonlinear dynamic behavior. A numerical method is necessary for analysing the dynamic behavior of the marine cable.

In this thesis, the dynamic behavior of a umbilical cable of deep-sea UUV is numerically studied. Governing equations are introduced. The equations are three dimensional, dynamic, nonlinear and coupled. In the numerical analysis, an implicit finite difference method is applied for the fast calculation of huge size of matrix. The nonlinear problem is solved by Newton-Raphson iteration. The program is appled to a 6,000m long cable for a deep-sea UUV and shows reasonable results.