Şener, Ö Sedat
Özgüven, Hasan Nevzat
In this study dynamic mesh forces and dynamic factors in a geared shaft system are studied by using a continuous system model. The system consists of a gear pair, two shafts carrying gears, and two inertias representing drive and load in the system. A continuous system model is used to include the shaft inertias, which are usually disregarded even in most of the sophisticated models. The primary aim of this work is to provide a tool for studying the effect of shaft inertia in gear dynamics, and to present some case studies. The results of the continuous system model are compared with those of a discrete system model in which the shaft inertias are neglected, and with the results of previous studies. Typically, the dynamic factors obtained by using the discrete system model are found to be greater than those obtained from the continuous system model, especially when shaft masses are large. It is concluded that the computation of dynamic factors by using the continuous system model suggested in this study in order to include the effects of shaft masses is a very good alternative to finite element models which are much more expensive to use.


Fluid-structure interactions with both structural and fluid nonlinearities
Bendiksen, O. O.; Seber, G. (Elsevier BV, 2008-08-19)
In this study, we consider a class of nonlinear aeroelastic stability problems, where geometric nonlinearities arising from large deflections and rotations in the structure interact with aerodynamic nonlinearities caused by moving shocks. Examples include transonic panel flutter and flutter of transonic wings of high aspect ratio, where the presence of both structural and aerodynamic nonlinearities can have a dramatic qualitative as well as quantitative effect on the flutter behavior. Both cases represent i...
Direct identification and expansion of damping matrix for experimental-analytical hybrid modeling
Özgen, Gökhan Osman (Elsevier BV, 2007-11-20)
The theory of direct experimental identification of damping matrix based on the dynamic stiffness matrix (DSM) method is further developed in this work. Based on the relationship between the DSMs of the smaller experimental model and larger analytical model, the mathematical relationship between the damping matrices of the two models is established. Examining the relationship, two methods are developed that can be used to expand the experimental damping matrix to the size of the analytical model. Validity o...
Ünlüsoy, Yavuz Samim; Tümer, Sami Turgut (Elsevier BV, 1994-01-20)
The dynamic behavior of overhead cam mechanisms, commonly used in automotive applications, is strongly influenced by the Coulomb friction at the rocker arm pivot. In this study, a non-linear one-degree-of-freedom model of such a mechanism including Coulomb friction has been developed. An exact quasi-linear solution to the equations representing the non-linear behavior has been obtained. The effects of Coulomb friction at different cam speeds are investigated using typical parameter values. A critical examin...
One-dimensional dynamic microslip friction model
Ciğeroğlu, Ender; Menq, Ch (Elsevier BV, 2006-05-09)
A one-dimensional dynamic microslip friction model, including the damper inertia, is presented in this paper. An analytical approach is developed to obtain the steady-state solution of the resulting nonlinear partial differential equations when subjected to harmonic excitation. In the proposed approach, according to the excitation frequency, a single mode of the system is considered in the steady-state solution for simplicity; consequently, phase difference among spatially distributed points is neglected. T...
Vibrations of open-section channels: A coupled flexural and torsional wave analysis
Yaman, Yavuz (Elsevier BV, 1997-07-03)
An exact analytical method is presented for the analysis of forced vibrations of uniform, open-section channels. The centroid and the shear center of the channel cross-sections considered do not coincide; hence the flexural and the torsional vibrations are coupled. In the context of this study, the type of any existing coupling is defined in terms of the independent motions which are coupled through mass and/or stiffness terms. Hence, if the flexural vibrations in one direction are coupled with the torsiona...
Citation Formats
Ö. S. Şener and H. N. Özgüven, “DYNAMIC ANALYSIS OF GEARED SHAFT SYSTEMS BY USING A CONTINUOUS SYSTEM MODEL,” JOURNAL OF SOUND AND VIBRATION, pp. 539–556, 1993, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42900.