Dynamic gangway responses between TLP and semi-submersible platform during tender-assisted drilling

Nonlinear hydrodynamic characteristics of multi-body platform system

“…The experimental result over the period around 12s is not as accurate as the shorter periods. A similar discrepancy is also reported by Dong et al [26] for the comparison of results between the experiments and theoretical study.…”

“…Since the symmetry of the platform of TLP and TAD, 0 ° and 45 ° wave headings are investigated for isolated TLP, isolated TAD and TLP-TAD coupled model. The experiment conducted by Dong et al [26] in the Deepwater Offshore Basin at Shanghai Jiao Tong University is used as a primary benchmark for the extensive validation of the present numerical model.…”

“…JONSWAP wave spectrum with significant wave height Hs, peak wave period Ts and spectral steepness 𝛾 are selected. According to Dong et al [26], the wind and current force were considered and replaced by the equivalent constant forces on platforms which are also applied in the present numerical simulation to replace the wind and current force. The viscous effect on the model is estimated by Morison equation and added to the damping matrix in the motion equations.…”

“…The present numerical model is validated against the data from the model tests carried out by Dong et al [26]. The main results of motion responses and wave loads for the individual platform and multi-body platform are compared in Section 4.1 and Section 4.…”

“…There are also some studies reported in the literature specifically focused on the dynamics of the hawsers and gangways connecting the two platforms. Dong et al [26] investigated the motion of gangway between two platforms in the multi-body platform system using both model test and numerical simulation. The results of gangway extension and rotation show that the dominant degree-of-freedom (DOF) of global motion for gangway responses is identical under different headings.…”