NDLI: Structural Dynamic Analysis Approach Used in a GE Heavy Duty Gas Turbine Combustor for MTBM Enhancement

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Jangid, Bihari Lal Provenzale, Michele Puglia, Eugenio Del
Copyright Year	2013
Abstract	Gas turbine combustors are subjected to vibrations due to combustion dynamics pressure and rotor imbalance force which results in forced excitation of hardware. Such structural vibration leads to high cycle fatigue and wear out of contact interfaces of combustor, thus limiting hardware durability with reduced maintenance intervals. To have more realistic hardware life prediction for both failure modes, it is vital to understand structural dynamic behavior of combustor assembly in the presence of vibratory loads. This paper describes the methodology used in developing MS5002D LHE combustor assembly linearized finite element dynamic models, the strategy to calibrate them with experimental data and the approach used to perform a forced responded analysis with harmonically varying combustion dynamics pressure and rotor imbalance force. Study shows that with adopted approach, an acceptable modal correlation between the model and the experimental test rig can be achieved. The forced dynamic response analysis results, in terms of dynamic stress distribution, interface sliding displacements and contact loads, represent the needed inputs for life prediction and for addressing the design improvements.
Sponsorship	International Gas Turbine Institute
File Format	PDF
ISBN	9780791855270
DOI	10.1115/GT2013-94447
Volume Number	Volume 7B: Structures and Dynamics
Conference Proceedings	ASME Turbo Expo 2013: Turbine Technical Conference and Exposition
Language	English
Publisher Date	2013-06-03
Publisher Place	San Antonio, Texas, USA
Access Restriction	Subscribed
Subject Keyword	Structural dynamics Stress concentration Vibration High cycle fatigue Rotors Durability Combustion Dynamic response analysis Maintenance Pressure Stress Design Gas turbines Dynamics (mechanics) Wear Dynamic models Hardware Manufacturing Excitation Finite element analysis Combustion chambers Failure mechanisms
Content Type	Text
Resource Type	Article

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