Computation of mooring chain with the touchdown on an inclined seabed

In this article, we discuss the effects of touchdown on an inclined seabed of a mooring system consisting of one or two chains joined at the sinker that is subjected to horizontal tension or tension at the suspension point. We modeled the statics of the system using the classical non-extensional catenary theory. For a system without a sinker, we provide an analytical solution for the governing equations, whereas for a system with a sinker, we derive governing equations that can be solved only numerically. Analytical formulae for the calculation of the restoring coefficient of the system are also provided. Numerical examples and a real case of mooring buoy design illustrate the use of the proposed model.