LNG

Software fixes twin propeller vibration issue

7 years ago

An ABS technical investigation, conducted at the request of a prominent Greek-based operator of LNG carriers, identified occasional, but infrequent, vibrations exceeding limits on a twin propeller LNG carrier fitted with super-efficient three-bladed propellers. The issue was resolved in conjunction with the vessel’s classification society, engine designer and the shipyard.

Raw measured vibration data showing the frequency beating phenomenon, with vibration acceleration in m/s2 in the y-axis and time in second in the x-axis.

An ABS technical investigation, conducted at the request of a prominent Greek-based operator of LNG carriers, identified occasional, but infrequent, vibrations exceeding limits on a twin propeller LNG carrier fitted with super-efficient three-bladed propellers. The issue was resolved in conjunction with the vessel’s classification society, engine designer and the shipyard.