Metal fatigue in vessel structures due to dynamic movement

Metal fatigue that occurs due to dynamic movement in a vessel. Two case studies using reliability engineering are diagnosed with modern technology, using vibration analysis and laser alignment on their propulsion systems. These types of ships have characteristics where both have different hull structure and material type; dynamic movement will occur no matter the features of the vessel. In both studies, it was found that the propulsion systems were not installed correctly and dynamic movement was detected which results in the reoccurring faults that the vessels were experiencing. The understanding of reliability engineering needs to be used when diagnosing metal fatigue.