The modularized design and construction philosophy is becoming a common trend for large onshore and offshore projects due to its advantage in schedule and cost-savings. Multiple modules are fabricated at different construction yards across the world and then transported to service sites by marine transportation vessels. Proper and accurate sea fastening design and analysis play an important role in order to ensure the integrity of both the modules and the transportation vessel. Finite Element Analysis (FEA) has been widely used for the structural design and verification in the transportation analysis. Common practice is based on decoupled analysis where separate FE models are created for the module and vessel structure respectively.
This paper presents a more advanced and accurate approach where interaction FE analysis is utilized to analyze the complete FE model of both the module and vessel structure simultaneously. Formulations derived for this analysis will be presented along with the methodologies of applying boundary conditions and environmental loads from hydrodynamic analysis. Results from a sample module transportation analysis are presented.