Hadyansyah, Sulthan RaffiSulthan RaffiHadyansyahFhandy, Brilliant AdityaBrilliant AdityaFhandySaputra, Reza KurniawanReza KurniawanSaputraFajri, AprianurAprianurFajriPrabowo, Aditya RioAditya RioPrabowoGanendra, BenBenGanendraEhlers, SörenSörenEhlersBraun, MoritzMoritzBraunDo, Quang ThangQuang ThangDo2026-05-152026-05-152025-10VIII International Conference “In-service Damage of Materials: Diagnostics and Prediction”, DMDP 2025https://hdl.handle.net/11420/63057This study integrates experimental and numerical insights from stiffened-plate penetration tests with analytical seabed geometry to interrogate grounding damage. Using a canonical indenter–plate configuration for stiffened panels, hull penetration resistance is assessed against seabed conditions represented by binormal and polynomial rock geometries. Real multibeam bathymetry is interpolated into continuous surfaces and introduced as rigid indenters, enabling direct comparison between simplified plate-level fracture mechanics and complex grounding loads. Finite element analysis (FEA) with ANSYS LS-DYNA examines three orientations: horizontal (lateral seabed intrusion), vertical (local stranding), and 45° (combined penetration/raking). Results show fracture initiation is governed by local stiffener–plate interactions. Damage evolution and absorbed energy depend strongly on seabed roughness and the projected contact area, thereby linking the fidelity of analytical rock models to penetration resistance.en2452-32162025514521Elsevierhttps://creativecommons.org/licenses/by-nc-nd/4.0/Finite Element AnalysisGroundingSeabed GeometryStiffened PanelTechnology::620: Engineering::620.1: Engineering Mechanics and Materials ScienceConference Paperhttps://doi.org/10.15480/882.1709510.1016/j.prostr.2026.03.08810.15480/882.17095