Damping of torsional vibrations of ship engine crankshafts - general selection methods of viscous vibration damper
نویسندگان
چکیده
منابع مشابه
Power Electronic Devices for Damping Torsional Vibrations
Torsional vibrations and resonance problems with synchronous machines are most frequently encountered in rotor systems with long shafts and large inertias constituting a weakly damped mechanical resonator which exhibits a low resonance frequency. It is impossible to obtain a effective mechanical damping for these torsional vibrations, but by using a power electronics device and an inductive or ...
متن کاملBoundary element methods in the prediction of the acoustic damping of ship whipping vibrations
Damping of ship whipping vibrations following a slam due to wave impact is traditionally assumed to be primarily of material or structural origin. However, several mechanisms of energy dissipation to the surrounding water exist, including gravity and acoustic waves. Neither transports much energy for the lowest frequency modes, in which the acoustic wavelength may be an order or magnitude great...
متن کاملViscous damping identification in linear vibration
Parametric identification of viscous damping models in the context of linear vibration theory is studied. Frequency domain identification methods based on measured frequency response functions (FRFs) are considered. Existing methods are classified into two main groups: matrix methods which use directly the measured FRF matrix, and modal methods which use modal parameters deduced from the FRFs. ...
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ژورنال
عنوان ژورنال: Polish Maritime Research
سال: 2011
ISSN: 1233-2585
DOI: 10.2478/v10012-011-0016-9