Extension of a coupled mooring–viscous flow solver to account for mooring–joint–multibody interaction in waves

Abstract To account for nonlinear wave–structure interaction, mooring dynamics and the associated viscous flow effects, a coupled mooring–viscous solver was formerly developed validated (Jiang et al. in Mar Struct 72:783, 2020a, Validation of dynamic model with RANS solver). This paper presents an extension to solve interacting articulated multibody offshore system. The presently extended is verified by comparing predicted motions loads on moored floating box those obtained from solver, which aimed solving single body. almost identical results both solvers verify multi-module coupling technique manner. Apart code comparison verification, numerical predictions are also against experimental tank measurements body multibody. good agreements between validate where wave-induced together acting lines joint connections were examined. Developed as open-source tool, shows potential methodology analyzing system, various configurations extreme sea states, goes beyond state art.