Shaftline — Rotating Machinery (Marine Propulsion)
15%
Failure prob ↓
30%
Bearing friction ↓
60%
Seal leakage ↓
18%
Seal weight ↓
17%
Follow-on eng. time ↓
Marine propulsion shaft systems require comprehensive vibration analysis and bearing design to ensure reliability under extreme dynamic loading.
Deliver complete shaftline analysis — propulsion shafting, plain journal & thrust bearings, shaft seal, and flexible coupling — for naval applications.
Executed hydrodynamic reaction force calculations, bending moments, and stiffness analysis validated against ANSYS and ShaftDesigner. Conducted longitudinal, lateral, and torsional vibration analysis. Designed water-lubricated journal bearings with 3D hydrodynamic CFD. Developed thrust bearing with thermal-tribological optimization. Led a 4-member team for propeller shaft-seal design to API standards.
Identified and eliminated an unloaded Plummer block bearing (root cause of no-load vibration), reducing design failure by 15% and cutting successive-project engineering time by 17%. Achieved 30% friction reduction in journal bearings, 60% leakage reduction in shaft seal with 18% weight reduction, and 30% improved heat dissipation in thrust pads.
Component Breakdown
Rotor Dynamics & Vibration Analysis
Longitudinal, lateral, and torsional vibration analysis across the full shaftline. Computed hydrodynamic reaction forces, bending moments, and stiffness — validated against ANSYS and ShaftDesigner. Identified and eliminated an unloaded Plummer block (root cause of no-load vibration).
Water-Lubricated Journal Bearings
Designed water-lubricated plain journal bearings using 3D hydrodynamic CFD. Optimized clearance, oil-film geometry, and load capacity for marine duty cycles.
Thrust Bearing — Thermal-Tribological Design
Developed the main thrust bearing with coupled thermal-tribological optimization. Targeted pad geometry and lubricant flow to maximize heat dissipation under axial load.
Propeller Shaft Seal (API Standards)
Led a 4-member team designing the propeller shaft seal to API standards. Reduced leakage and overall weight while improving service life on naval applications.