| dc.description.abstract | Vibration is one of the main challenges in steam turbine operation that can cause
mechanical damage, decreased efficiency, and potential system failure. This study
aims to conduct vibration analysis on the steam turbine runner and shaft, identify the
main causes of vibration with a dynamic system approach, and design engineering
strategies to reduce vibration in support of maintenance programs. The analysis was
conducted on a single-stage, two-row steam turbine with a power of 1000 kW and a
rotational speed of 5500 rpm. Vibration data was obtained using Schenck
SmartBalancer devices mounted at the Shaft End and Equipment End points.
Parameters observed included displacement, velocity and acceleration in the axial,
vertical and horizontal directions. The maximum recorded vibration values reached
13.2 m/s² for acceleration and 4.12 mm/s for velocity on the coupling to gearbox (EE)
side. To understand the dynamic behavior of the system, the values of mass, stiffness,
damping, and dynamic characteristics including compliance, mobility, and inertia
were calculated theoretically. The transmissibility evaluation showed a peak value of
1.523 at the shaft, indicating resonance. As an engineering strategy, this approach
includes identification of dominant vibration source points, analysis of vibration
energy, and simulation of vibration reduction through adjustment of system
characteristics, such as increased damping or mass redistribution. The results showed
a significant decrease in vibration amplitude after the implementation of the technical
intervention. With this strategy, the turbine system showed better vibration stability
and supported the achievement of more effective predictive maintenance. | en_US |
