Obedient
发表于 2025-3-28 15:47:40
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竖琴
发表于 2025-3-28 19:03:38
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漂亮才会豪华
发表于 2025-3-29 02:49:00
Vibration Measurement and MonitoringSuccessful vibration measurement and analysis require an intimate familiarity with types of measurement, transducer characteristics and application, plus the capabilities and limitations of the diagnostic instrumentation.
有斑点
发表于 2025-3-29 05:13:41
Identification of Modal Parameters of RotorsThe occurence of instability in rotating machinery may be caused by different effects: oil film in journal bearings, sealings, internal damping etc.
担忧
发表于 2025-3-29 07:49:46
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Hyperopia
发表于 2025-3-29 13:57:36
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diabetes
发表于 2025-3-29 16:16:03
Theory of Bearing Static and Dynamic Properties acting on the journal at any moment of its vibrations. Discussed here will be hydrodynamic journal bearings, applied widely in machines. These bearings at sufficient oil supply, produce oil film and generate oil pressure and separate fully rotating journal from the sleeve.
反馈
发表于 2025-3-29 22:30:54
Stiffness and Damping Characteristics of Tilting-Pad Journal Bearingsics of the bearings. Large turborotors are usually guided in hydrodynamic journal bearings. Tilting-pad journal bearings are used particularly for horizontal or vertical shafts of high diameters. If the amplitude of the shaft vibration is small compared with the clearance of the bearing, the charact
CLASH
发表于 2025-3-30 03:13:32
Principles of Rotor System Instabilitythe speed ω, are of the form . External h. and internal h. damping coefficients, reduced to the reference unit mass (Aρ). of the shaft are . c. and c. are equivalent viscous coefficients of external and internal damping and Aρ and EI are respectively mass of unit length and stiffness of the shaft, b
Ptsd429
发表于 2025-3-30 05:52:44
Stability of Rotors in Bearingscalled “threshold” speed. Stable operation usually resumes when the speed is again decreased below this threshold speed. Unstable whirl motions can cause mechanical problems such as rubbing between journal and bearing, seal rubbing, and blade/stator rub contacts, and may result in substantial machin