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http://dx.doi.org/10.7837/kosomes.2018.24.4.482

The Effect of Transient Eccentric Propeller Forces on Shaft Behavior Measured Using the Strain Gauge Method During Starboard Turning of a 4,700 DWT Ship  

Lee, Jae-ung (Division of Marine Mechatronics, Mokpo National Maritime University)
Kim, Hong-Ryeol (Training Ship, Mokpo National Maritime University)
Rim, Geung-Su (Training Ship, Mokpo National Maritime University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.24, no.4, 2018 , pp. 482-488 More about this Journal
Abstract
Generally, after stern tube bearing shows a significant increase in local load due to propeller load, which increases the potential adverse effects of bearing failure. To prevent this, research on regarding shaft alignment has been carried out with a focus on reducing the relative slope between the shaft and support bearing(s) under quasi-static conditions. However, for a more detailed evaluation of a shafting system, it is necessary to consider dynamic conditions. In this context, the results revealed that eccentric propeller force under transient conditions such as a rapid rudder turn at NCR, lead to fluid-induced instability and imbalanced vibration in the stern tube. In addition, compared with NCR condition, it has been confirmed that eccentric propeller forces given a rapid rudder starboard turn can lift a shaft from the stern tube bearing in the stern tube, contributes to load relief for the stern tube bearing.
Keywords
Rudder turn; Eccentric propeller forces; Dynamic condition; Fluid induced instability; Imbalanced vibration;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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