![]() Jauhari K, Widodo A, Haryanto I (2015) Evaluation of dynamic behavior a machine tool spindle system through modal and unbalance response analysis. HadiJalali M, Ghayour M, Ziaei-Rad S, Shahriari B (2014) Dynamic analysis of a high speed rotor-bearing system. An FRP DSCT (Fiber Reinforced Polymer Double-Skinned Composite Tubular) column was applied to a wind turbine tower and its bending performance was experimentally evaluated. Hong D-K, Choi J-H, Woo B-C et al (2013) Rotordynamic analysis and experimental validation of a high speed induction motor made by copper die casting process. ![]() Taplak H, Parlak M (2012) Evaluation of gas turbine rotor dynamic analysis using the finite element method. Jeon SM, Kwak HD, Yoon SH, Kim J (2008) Rotordynamic analysis of a turbopump with the casing structural flexibility. In: Proceedings of ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition GT2017, 26–30 June 2017 Moroz L, Romanenko L, Kochurov R, Kashtanov E (2017) Prediction of structural supports ınfluence on rotating machinery dynamics. The turbine stage could be tested successfully up to its design speed after implementing all design modifications. Designer’s challenges arising from overall layout, manufacturing, imported hardware, assembly and operation are highlighted while addressing the problem. Considering the difficulty experienced to pass the first critical speed quickly, the rotor-bearing system of the rig is completely redesigned with safe separation margin away from the design speed. The relative test method without preliminary calibration of the flowmeter site of the scroll casing can give sufficiently reliable results in determining the optimal zone and form of the. Finally, take some time to analyse and fully understand the various vibratory modes of your test stand structure to make sure they will not couple with any modes occurring. On both occasions, the bearing failure took place when the rotor was approaching the first critical speed. The ICD will also give guidelines on designing whatever provisions your test stand will have for intake and exhaust flows, fuel flows, bleed air flows, FADEC interface, etc. During operation, one of the bearings supporting the rotor has failed twice causing significant damages. The design modifications, driven by rotordynamic considerations, carried out for an existing high-speed test rig with serious operability issues are presented in this paper. However, in very few cases, the resonance crossovers pose serious problems resulting from operational schedules and demand major modifications to rotor-bearing system. When the critical speeds exist within the design speed, it is possible to accelerate the rotor through resonant speed zones in many applications. The high-speed test rigs pose several operational problems originating from rotordynamics, bearings, lubrication and thermal gradients.
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