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Shaft Alignment, Thrust Bearings & Torsional Vibration
Inside this lesson
- Describe the shaft line and the role of the thrust bearing in transmitting propeller thrust to the hull
- Explain why shaft alignment matters and what misalignment causes
- Define torsional natural frequency and the first-order critical shaft speed
- Explain what a barred speed range is and why it must be passed through quickly
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Educational content covering topics typical of a first- and second-year marine engineering / naval architecture curriculum. Not a substitute for accredited coursework, and not suitable for real vessel design, operation, or safety decisions without review by a licensed professional engineer. References to classification societies, SOLAS, or MARPOL are descriptive context only, not compliance guidance.