Dynamic responses of serially connected truss pontoon-MOB – A numerical investigation. (1st June 2023)

• Record Type: Journal Article
• Authors: Sakthivel, Somansundar; Kumar, Narendran; Poguluri, Sunny Kumar
• Is Part Of: Ocean engineering. Volume 277(2023)
• Publication Date: 2023-06-01
• Subjects: TP-MOB -- Flexible connectors -- Hydroelasticity -- Structural response -- Connector forces; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2023.114209
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: Very large floating structures (VLFS) are typically made up of several modules of offshore platforms, such as semi-submersibles, connected by mechanical connectors. The proposed Truss Pontoon Mobile Offshore Base (TP-MOB) is a new type of offshore platform based on the truss pontoon semi-submersible design. The design of the connectors is crucial for the functionality of the structure. In this study, the flexible connectors are modeled with a 3D source distribution method and the wave forces are estimated with 3D linear potential theory. The open-source finite element-based numerical model, HYDRAN-XR, is used to analyze the structural responses and connector forces in both regular and irregular wave conditions. The results indicate significant differences in responses between single and multi-module cases, especially in extreme waves. Loads on the connector change greatly for three- and five-module cases, with maximum values at specific wave angles. Highlights: Investigated the Truss Pontoon - MOB using open-source finite-element-based code (HYDRAN-XR tool). Implemented Rigid Module Flexible Connector (RMFC) for the Truss Pontoon - MOB. Single and multi-module interactions of Truss Pontoons - MOBs are considered under regular/irregular wave conditions. Responses and forces acting on the connectors of Truss Pontoon - MOB modules are reported.