Shipboard compressor system risk analysis by using rule-based fuzzy FMEA for preventing major marine accidents

Abstract

Considering the shipboard machinery, the compressed air system directly powers the ship's diesel engines' starting and routine operations. Additionally, pressurized air is distributed throughout the ship, enabling the operation of various systems. However, a compressor failure could result in the entire compressed air system collapsing, which might also result in the ship losing its maneuverability. When a ship loses its ability to maneuver, various devastating risks can arise, including grounding, collision, contact, explosion, and fire. On the other hand, compressor system risk assessment is not a widely researched subject in the field of maritime. To fill this gap, this study provides a comprehensive risk assessment of the shipboard compressor system by utilizing the rule-based fuzzy Failure Mode and Effects Analysis (FMEA) method. 33 failure modes with their causes and consequences were determined with their expert-assigned O–S-D scores. In addition, 125 If-Then rules in the fuzzy logic system were created specifically for this study. Finally, the failure modes of the shipboard compressor system were prioritized. According to the results, the most critical failure modes are identified as FM18-Broken piston rings with a 6.43 fuzzy RPN score, FM08-Piston liner wear with 6.29, and FM11-Knocking compressor operation with a 5.59. The results of this study will contribute to the maritime sector by analyzing the risks of compressor systems and introduce them to safety specialists, ship crew, shipping companies, port authorities, inspection officers, etc.