Aero-Derivat ive Gas Turbine Vibration Troubleshooting Comparing Traditional ODS and
Abstract
A large aero-derivative gas turbine in electrical generation service was exhibiting high vibration at the LP compressor section (1.5 in/s peak) at low load operation. Thorough testing, using Experimental Modal Analysis (EMA) and Operating Deflection Shape (ODS) indicated that the vibration was due to a structural resonance (4-day testing). This excessive flexibility of the baseplate could have been detected immediately (one day) using Motion Magnification Video (MMV) testing technology. This involves a high speed video camera and related software, to magnify the motion of the engine and baseplate in slow motion. Unfortunately, MMV was not yet developed.
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Citation
Onari, Maki M. (2021). Aero-Derivat ive Gas Turbine Vibration Troubleshooting Comparing Traditional ODS and. Turbomachinery Laboratory, Texas A&M Engineering Experiment Station; Texas A & M University. Libraries; Texas A & M University. Libraries. Available electronically from https : / /hdl .handle .net /1969 .1 /196716.