ANALISIS GETARAN PAKSA PADA TURBIN UAP UNTUK EVALUASI KEANDALAN MENGGUNAKAN METODE KUANTITATIF

Abstract

A steam turbine operates at high rotational speed, generating significant centrifugal forces that can induce vibrations and lead to failures such as fatigue, ultimately reducing its reliability. This study aims to enhance steam turbine reliability through a forced vibration analysis approach, which includes vibration monitoring and selecting an appropriate maintenance strategy using a quantitative method implemented in GNU Octave. For a steam mass flow rate of 187.09 t/h, the dominant vibration frequency of 33.8 Hz is close to the system’s natural frequency of 31.8 Hz, indicating a high risk of resonance. Maintaining the flow rate between 211 t/h and 243 t/h effectively shifts the dominant frequency away from the natural frequency, reducing this risk. Based on the load condition, the remaining service life is estimated at 5.3 years, with predictive maintenance identified as the most suitable strategy.