Journal ArticleDOI
Nonstationary analysis of nonlinear rotating shafts passing through critical speed excited by a nonideal energy source
Alireza Mahmoudi,S.A.A. Hosseini,M. Zamanian +2 more
- Vol. 232, Iss: 4, pp 572-584
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TLDR
In this paper, the effect of nonlinearity on vibration of a rotating shaft passing through critical speed excited by nonideal energy source is investigated, where the interaction between a nonlinear gyroscopic continuous system (i.e. rotating shaft) and the energy source was considered.Abstract:
In this paper, the effect of nonlinearity on vibration of a rotating shaft passing through critical speed excited by nonideal energy source is investigated. Here, the interaction between a nonlinear gyroscopic continuous system (i.e. rotating shaft) and the energy source is considered. In the shaft model, the rotary inertia and gyroscopic effects are included, but shear deformation is neglected. The nonlinearity is due to large deflection of the shaft. Firstly, nonlinear equations of motion governing the flexural–flexural–extensional vibrations of the rotating shaft with nonconstant spin are derived by the Hamilton principle. Then, the equations are simplified using stretching assumption. To analyze the nonstationary vibration of the nonideal system, multiple-scale method is directly applied to the equations expressed in complex coordinates. Three analytical expressions that describe variation of amplitude, phase, and angular acceleration during passage through critical speed are derived. It is shown that...read more
Citations
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Journal ArticleDOI
Nonlinear vibration of in-extensional rotating shaft under electromagnetic load
TL;DR: In this article, the nonlinear vibration of a simply supported rotating shaft with nonlinear curvature and gyroscopic effect under transversely electromagnetic load is investigated, which is assumed that the shaft is inextensible and electromagnetic load depends on the shaft deformations.
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Resonant capture and Sommerfeld effect due to torsional vibrations in a double Cardan joint driveline
TL;DR: In this article, the dynamics of a system comprising a heavy rotor coupled to a motor through a long and torsionally flexible drive shaft with universal joints (U-joints) at its both ends is studied numerically.
Journal ArticleDOI
Non-stationary analysis of a rotating shaft with geometrical nonlinearity during passage through critical speeds
TL;DR: In this paper, an analysis of a rotating shaft with stretching nonlinearity during passage through critical speeds is investigated, and the effects of angular acceleration, stretching non-linearity, eccentricity and external damping on maximum amplitude of the shaft are investigated.
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Vibrational resistance to vehicle motion due to road unevenness
I. Blekhman,E. Kremer +1 more
TL;DR: In this article, the effect of road unevenness on the dynamics of the averaged longitudinal motion of a vehicle is investigated with the help of a minimal model, which enables us to understand the mechanism of interaction between the longitudinal motion and the vertical vibrations excited by unevenness.
References
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TL;DR: In this paper, the dynamical coupling between energy sources and structural response is analyzed for real motors, since real motors have limited output power, and it must not be ignored in real engineering problems.
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