Establishing the True Dynamic Bending Moment of Propeller Shaft Using a Single Bridge of Strain Gauge
Source abstract
Abstract
The measurement of shaft bending (whirling) moment can be performed via a telemetry system including strain gauges which can obtain the bending stress. By using a single bridge of strain gauge, it was possible to obtain only the nominal bending moment. However, in case of the propeller shaft vibration measurement, the true dynamic bending moment is needed to evaluate the effect of propeller forces on the stability of the bearings. To deal with this, typically two bridges of strain gauge at 90 degrees are needed. This research presents a novel reliability assessment method in establishing the true dynamic bending moment using only one bridge of strain gauge. This is achieved by using the actual bending stress measured by strain gauge combined with its own phase lag stress at an angle of 90 degrees. To validate this technique, the experiments were performed under the rapid turning transient states during a sea trial of a 50,000 DWT oil/chemical tanker. As a result, great fluctuations in propeller force were detected, resulting in a non-uniform oil film in the bearings. The displacement sensor was also installed and confirmed the established true dynamic bending moment.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Tribology and Lubrication Engineering · Engineering Structural Analysis Methods · Gear and Bearing Dynamics Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Division of Marine System Engineering, Korea Maritime and Ocean University, Busan 49112, Korea
Interdisciplinary Major of Maritime AI Convergence, Korea Maritime and Ocean University, Busan 49112, Korea
Division of Marine Information Technology, Korea Maritime and Ocean University, Busan 49112, Korea
Machinery Team of Technical Division, Korean Register, Busan 46762, Korea
Division of Marine Engineering, Mokpo National Maritime University, Mokpo 58628, Korea
Funding
Development of Autonomous Ship Technology · Ministry of Oceans and Fisheries
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