Evaluasi Keandalan Struktural dan Margin Keselamatan Getaran Mekanis pada Generator Set Diesel 350 kVA
DOI:
https://doi.org/10.55606/jtmei.v5i2.6130Keywords:
Danger Ratio, Generator Set, ISO 8528-9, RMS Velocity, Vibration AnalysisAbstract
Mechanical vibration in diesel generator sets is a critical parameter that must be precisely evaluated to ensure reliability and prevent unexpected operational failures. This study aims to analyze the dynamic characteristics of structural vibration in a 350 kVA (1500 RPM) generator set based on the ISO 8528-9 international standard. The applied method was a quantitative observational approach under steady-state operational conditions. Data collection was conducted by directly measuring the Root Mean Square (RMS) velocity at eight main chassis mounting points in both horizontal and vertical orientations. The structural reliability level was then analytically calculated using the Danger Ratio and Margin of Safety percentage formulations. Field test results indicated that the highest vibration load distribution accumulated on the horizontal axis, with a peak amplitude surge reaching 14.6 mm/s at the front right quadrant of the alternator chassis. Based on mathematical calculations, this extreme point generated a danger ratio of 58.40%. Despite enduring the highest load, the mounting structure proved to be stable by maintaining a safety margin of 41.60%. Comprehensively, all sixteen validated amplitude measurements were well below the maximum operational tolerance limit of 25 mm/s. Therefore, it can be concluded that this generator set installation mechanically fulfills the technical feasibility requirements and is declared highly reliable for continuous operation.
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