...Ivo Senjanović; Ivan Áatipović; Neven Alujević; Damjan Čakmak; Nikola Vladimir In this paper, a finite strip for vibration analysis of rotating toroidal shells subjected to internal pressure is developed. The expressions for strain and kinetic energies are formulated in a previous paper in which...

...Hua Li References [1] Bryan , G. H. , 1890 , “ On the Beats in the Vibration of Revolving Cylinder or Bell ,” Proc. Cambridge Philos. Soc. , 7 , pp. 101 – 111 . [2] Li , H. , Lam , K. Y. , and Ng , T. Y. , 2005 , Rotating Shell Dynamics , Elsevier , Oxford, UK...

... rotors is investigated. Here, the nonlinear equations-of-motion of the twin-rotor/ABD system are derived and the asymptotic stability about the balanced condition is determined via a perturbation and floquet analysis. It is found that for the case of co-rotating rotors, automatic balancing is only...

...Ryan J. Monroe; Steven W. Shaw; Alan H. Haddow; Bruce K. Geist Centrifugal pendulum vibration absorbers are used for reducing engine-order torsional vibrations in rotating machines. The most common configuration of these devices utilizes a bifilar suspension in which the absorber mass is suspended...

... into rotational motion. In addition, the transformer could be integrated with coils, magnets, and electric circuits to form a portable energy scavenging device. A thorough dynamic analysis of the proposed transformer system is conducted in this study in order to characterize the relationships between the varied...

... mounted on a rotating hub. Assuming Euler–Bernoulli beam equations and considering the effect of a piezoelectric transducer, equations of motion are derived using the Lagrangian approach followed by relationships describing the harvested power. The equations provide a quantitative description of how...

...Ramin M. H. Khorasany; Stanley G. Hutton This study examines the frequency characteristics of thin rotating disks subjected to axisymmetric nonflatness. The equations of motion used are based on Von Karman’s plate theory. First, the eigenfunctions of the stationary disk problem corresponding...

...Jun Liu; Yukio Ishida Automatic ball balancer is a balancing device where two balls inside a hollow rotor move to optimal rest positions automatically to eliminate unbalance. As a result, vibrations are suppressed to the zero amplitude in the rotational speed range higher than the major critical...

...Yong-an Huang; Zhou-ping Yin; You-lun Xiong This paper is presented to improve the modeling accuracy and the computational stability for a high-speed rotating flexible structure. The differential governing equations are derived based on the first-order approximation coupling (FOAC) model theory...

...Huajiang Ouyang; Minjie Wang This paper presents a dynamic model for the vibration of a rotating Rayleigh beam subjected to a three-directional load acting on the surface of the beam and moving in the axial direction. The model takes into account the axial movement of the axial force component...

...Guangyoung Sun A rotating machine with active magnetic bearings (AMBs) requires conventional bearings as a backup support system in the case of AMB failure. This paper presents an estimated auxiliary/catcher bearing (CB) L 10 fatigue life based on the Hertzian contact dynamic loads between bearing...

...Sripathi Vangipuram Canchi; Robert G. Parker Parametric instabilities of in-plane bending vibrations of a rotating ring coupled to multiple, discrete, rotating, time-varying stiffness spring-sets of general geometric description are investigated in this work. Instability boundaries are identified...

... resonance relationship into account. Furthermore in many practical rotating machines, the effect of gyroscopic moments are relatively small. Therefore, the one-to-one internal resonance relationship holds approximately between forward and backward natural frequencies in such machinery. In this paper...

... in the 1970s, this issue recently resurfaced with the incorrect statement that hysteretic damping of rotating elements is destabilizing at any speed (even subcritical). The aim of the present paper is to clarify this issue in terms of the practical applications of the theory in an unequivocal way. 01 June...

...Horng-Jou Wang, Graduate Student; Lien-Wen Chen, Professor The axisymmetric dynamic stability of rotating sandwich circular plates with a constrained damping layer subjected to a periodic uniform radial loading along the outer edge of the host plate is studied in the present paper. The viscoelastic...

...Jo¨rg Wauer, Professor 04 05 2004 vibrations bending rotation discs (structures) eigenvalues and eigenfunctions In a recent paper by Deshpande and Mote Jr., the stiffening effect for a thin disk due to its rotation on the eigenfrequencies of the in-plane vibrations...

...R. Gordon Kirk 04 05 2004 machine theory vibrations damping rotation classical mechanics Correction to the definition of the imbalance mass required to correct a disk skew as reported on page 459. The equation was stated correctly, the explanation of the term U oz...

... of a Rotating Beam,” 1st US National Congress of Applied Mech, Jnl. Aeron. Sci. , 11 , p. 75. Prohl , M. A. , 1945 , “ A General Method for Calculating Critical Speeds of Flexible Rotors ,” ASME J. Appl. Mech. , 12 ( 3 ), pp. 142 – 148 . Lund , J. W. , and Sternlicht , B. , 1961...

... and Sound for publication in the Jørgen Lund Special Issue of the JOURNAL OF VIBRATION AND ACOUSTICS . Manuscript received October 2002. Associate Editor: G. T. Flowers. 01 October 2002 08 10 2003 machine bearings rotation vibrations damping mechanical stability In addition...

...R. Gordon Kirk, Professor, A total understanding of rotating machinery vibration analysis requires evaluation of critical speed placement, forced response sensitivity to imbalance, linear onset of instability prediction and full non-linear response analysis. Of these four areas of analysis, only...