Akademik Veri Yönetim Sistemi
3rd International Congress on Ship and Marine Technology, Trabzon, Türkiye, 10 - 12 Aralık 2024, cilt.1, ss.55-67, (Tam Metin Bildiri)
The verification of ship structural applications is a critical step in ensuring their reliability, safety, and regulatory compliance. This study focuses on the evaluation of ship structural designs that either conform to or exceed established class rules, using Direct Strength Calculations (DSCs) performed through the Finite Element Method (FEM). The aim is to enhance the understanding and effectiveness of structural performance assessments by leveraging high-fidelity computational models to predict stress distributions, deformations, and failure modes under various load conditions. The study identifies potential discrepancies between traditional rule-based design approaches and advanced numerical modelling, highlighting areas where FEM can provide enhanced accuracy or uncover unforeseen vulnerabilities. FEM analysis is conducted for representative two different ship structure model, including superstructure of a Ro-Ro ship with primary framing members and a rudder blade of fishing vessel that is a critical local component to evaluate their strength and compliance with classification society requirements. The results of these analyses reveal key insights into structural integrity margins, load-carrying capacities, and areas that benefit from reinforcement or optimization. Moreover, this work highlights scenarios where designs surpass traditional standards, offering evidence-based recommendations for best practices in shipbuilding and regulatory approval processes. The findings underscore the importance of integrating advanced simulation techniques in the design verification process to ensure robust and innovative ship structures capable of withstanding complex maritime environments. As a result, in addition to a new structural model to eliminate the negative deflection problem in the 1st deck of superstructure of the Ro-Ro ship, it is recommended that the classification society should make additional finite element analysis mandatory for the superstructures and deck houses of such ships. In addition, a final model for the rudder blade of the Black Sea fishing vessels was proposed by proving their strength adequacy, approved by Türk Loydu and started to be manufactured.