Finite element definition of effective stiffness coefficients for power submarine cable with heterogeneous structure
This article studies the numerical definition of effective stiffness coefficients for power submarine cable. As the object of the research, various distinctive types of cables are considered: three-core single armoured cable 2XS2YRAA, one-core single armoured cable ZS-YJQ41 and one-core double armoured cable - analogue GASLMLTV. The aim of the research is to define the effective properties of the homogeneous cable material, which are equivalent at macro-level to cable section, consisting of heterogeneous isotropic materials. The study includes the following problems: tension of the cable, bending of the cable and torsion of the cable. The finite element method is chosen as the research method. To achieve the aim of the research, computer program for solid modeling SolidWorks and software suite for finite element analysis ABAQUS are used. SolidWorks is used to develop full-scale geometric CAD models while ABAQUS is used when working out and solving computational CAE models. The novelty of the work consists in the approbation of the method of calculating the effective stiffness coefficients for power submarine cables: 2XS2YRAA, ZS-YJQ41 and analogue GASLMLTV. The simulation results are presented in the form of distribution of cable movements of different types, as well as in the form of a table with effective stiffness coefficients. The practical value of the research is the possibility of a significant reduction of computing resources to obtain solutions to macro-level problems, such as: mooring, cable laying, towing, dynamics of system “vessel - underwater vehicle”.