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Item type:Publication, Access status: with files , Mechanical behavior assessment of dynamic ice forces using FE method: Interaction with an idealized offshore structure(Elsevier, 2025-10); ; ; Dynamic interaction between sea ice and offshore structures is a critical factor in design for operations in cold regions. This study investigates ice impact through numerical simulation to provide information relevant to offshore structural design. A finite element model was developed to simulate the collision between an ice sheet and a conical structure, with ice velocity as the primary parameter. The calculations were carried out using an explicit dynamics approach, which enables the simulation of time-varying impact forces. The results indicate that higher ice velocities result in greater stress within the ice sheet, generating larger reaction forces on the structure, with the increase following a nonlinear trend. These findings provide quantitative insight into the magnitude of loads that may be transmitted to offshore structures, underscoring the importance of accounting for dynamic ice forces in structural design.Publicationtype: Conference Paper24 13 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Effect of geometric imperfections on CO₂ transport pipelines under fatigue loading(Elsevier, 2025-10); ; ; ; Ganendra, BenCatastrophic failures of CO₂ transport pipelines can result in severe economic losses and even casualties. During operation, pipelines are subjected to cyclic loading, which may lead to fatigue failure. The presence of geometric imperfections (GI) arising from installation processes introduces uncertainty that can affect the pipe’s strength under these conditions. This study assesses the impact of dent-type GI on the fatigue resistance of CO₂ transport pipelines using a validated finite element method (FEM). Fatigue analysis was conducted using the hot-spot stress approach on the straight tubular pipe with dent-type GI ranging from 0% to 20%. The pipe material is ASTM A36 steel, and the boundary conditions represent an onshore buried pipeline. The results show that the higher the percentage of dent-type GI, the lower the fatigue life due to the stress concentration effect. Further experimental tests and fluid–structure interaction studies are recommended to extend these findings.Publicationtype: Conference Paper47 9 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Grounding damage of stiffened hull panels: a numerical study on orientation effects and seabed-shape-driven energy dissipation(Elsevier, 2025-10); This 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.Publicationtype: Conference Paper38 13