... deals with most of the possible interactions between gears, shafts, and hydrodynamic journal bearings. A specific element for wide-faced gears with nonlinear time-varying mesh stiffness and tooth shape deviations is combined with shaft finite elements, whereas the bearing contributions are introduced...

... and Diagnosis Using Sensor Fusion ,” J. Sound Vib. , 188 ( 2 ), pp. 227 – 242 . 10.1006/jsvi.1995.0588 3 Wang , W. , and Wong , A. K. , 2002 , “ Autoregressive Model-Based Gear Fault Diagnosis ,” ASME J. Vib. Acoust. , 124 , pp. 172 – 179 . 10.1115/1.1456905 4 Bornn , L...

...Xiaojun Zhou; Yimin Shao; Yaguo Lei; Mingjian Zuo A modified mathematical model for simulating gear crack from root with linear growth path in a pinion is developed, in which an improved potential energy method is used to calculate the time-varying meshing stiffnesses of the meshing gear pair while...

...Christopher G. Cooley; Robert G. Parker; Sandeep M. Vijayakar A finite element formulation for the dynamic response of gear pairs is proposed. Following an established approach in lumped parameter gear dynamic models, the static solution is used as the excitation in a frequency domain solution...

...Yichao Guo; Robert G. Parker This paper studies the sensitivity of general compound planetary gear natural frequencies and vibration modes to inertia and stiffness parameters. The model admits planetary gears having any combination of stepped-planet, meshed-planet, and multiple stage arrangements...

...Albert C. J. Luo; Dennis O’Connor In this paper, an impact model with possible stick between the two gears is proposed for gear transmission systems, which includes the piecewise backlash model and the traditional impact model for the first time. The new model presented in this paper possesses...

... setup. The second is the evaluation of the potential of the acquired with the new concept AE signals in distinguishing between different types of artificially induced damage on the gears. Run-in tests were carried out to study the effect of gear damage on the AE recordings. The acoustic emission...

...S. J. Loutridis The vibration time series of gear systems exhibit self-similarity. The time-series behavior is characterized by an exponent, known as the scaling exponent. An algorithm is proposed for the estimation of both global and local exponents, thus providing a means of examining the time...

.... The grazing is the origin of the periodic motion switching for this system. Such a grazing bifurcation cannot be estimated through the local stability analysis. This model is applicable to prediction of periodic motions in nonlinear dynamics of gear transmission systems. Switching sections and basic...

... for cyclostationary signals than the classical AR model. In the end the proposed method is used for detecting incipient gear crack fault in a helicopter gearbox. The results demonstrate that the approach can be used to detect and predict early faults of complex rotating machinery by the kurtosis of the residual...

... governing the occurrence and suppression of instabilities are discussed for special cases with symmetric circumferential spacing of spring-sets. These results are applied to identify possible conditions of ring gear instability in example planetary gears. gears mechanical stability rotation vibrations...

...Vijaya Kumar Ambarisha; Robert G. Parker This work analytically derives design rules to suppress certain harmonics of planet mode response in planetary gear dynamics through mesh phasing. Planet modes are one of three categories of planetary gear vibration modes. In these modes, only the plantes...

...Jing Lin, Post Doctoral Fellow; Ming J. Zuo, Professor, Wavelet filtering is combined with cyclostationary analysis for detection of gear tooth faults in a gearbox. The parameters of the wavelet filter are optimized by using the proposed entropy minimization rule. This method is shown...

...M. Kubur; A. Kahraman; D. M. Zini; K. Kienzle A dynamic model of a multi-shaft helical gear reduction unit formed by N flexible shafts is proposed in this study. The model consists of a finite element model of shaft structures combined with a three-dimensional discrete model of helical gear pairs...

...L. Gelman; V. Giurgiutiu; A. Bayoumi An innovative statistical methodology and generic expressions have been developed for the ratio of the dynamic mean excitation to the transmitted mean load under the influence of the important gear characteristics. Simple expressions have been established...

...Sejoong Oh; Karl Grosh; James R. Barber A system of two meshing gears exhibits a stiffness that varies with the number of teeth in instantaneous contact and the location of the corresponding contact points. A classical Newtonian statement of the equations of motion leads to a solution...