...Shuhaimi Mansor; Martin Passmore This paper describes a technique for determining the dynamic aerodynamic yaw moment derivative based on the time response data using an oscillating model rig. The aerodynamic yaw moment derivatives are initially estimated using oscillation frequency and amplitude...

... practically observed wobble-mode bursting oscillations that are associated most frequently with down-hill riding. If the vehicle is cornering under constant acceleration, at a fixed roll angle, it is shown that for low values of acceleration (and braking), it follows closely a logarithmic spiral shaped...

... are given to verify the accuracy of the derived expressions. 25 02 2009 24 09 2009 31 03 2010 31 03 2010 approximation theory damping eigenvalues and eigenfunctions oscillations reduced order systems state-space methods viscoelasticity The characterization of energy...

...S. A. Eftekhari; M. Farid; M. Khani In this paper, a numerical algorithm using a coupled finite element-differential quadrature (DQ) method is proposed for the dynamic analysis of laminated composite coated beams subjected to a stream of accelerating oscillators. The finite element method...

...Bryan Eisenhower; Gregory Hagen; Andrzej Banaszuk; Igor Mezić In this paper we investigate oscillations of a dynamical system containing passive dynamics driven by a positive feedback and how spatial characteristics (i.e., symmetry) affect the amplitude and stability of its nominal limit cycling...

... of oscillation increases as the region over which the forcing is applied increases. The model is the basis for a more complete coupled catch/cod-end model. 30 11 2006 08 05 2007 16 01 2008 deformation fishing industry harmonic analysis oscillations partial differential equations ships...

...U. H. Hegazy; M. H. Eissa; Y. A. Amer This paper is concerned with the nonlinear oscillations and dynamic behavior of a rigid disk-rotor supported by active magnetic bearings (AMB), without gyroscopic effects. The nonlinear equations of motion are derived considering a periodically time-varying...

... relatively introduces the expansion of amplitudes and the reduction of frequencies of the riser vibrations. The pulsatile frequencies of the internal flow in wave aspect could reform the oscillation behavior of the conveyor pipe. The effect of fluid transportation rate on natural frequencies and mode...

...O. V. Gendelman; Yu. Starosvetsky Quasi-periodic response of a linear oscillator attached to nonlinear energy sink with relatively small mass under external sinusoidal forcing in a vicinity of main (1:1) resonance is studied analytically and numerically. It is shown that the quasi-periodic response...

...P. D. Spanos; A. Sofi; M. Di Paola The nonstationary random response of a class of lightly damped nonlinear oscillators subjected to Gaussian white noise is considered. An approximate analytical method for determining the response envelope statistics is presented. Within the framework of stochastic...

...)90112-4 , 7 , pp. 16 – 39 . Linsay , P. S. , 1981 , “ Period Doubling and Chaotic Behavior in a Driven Anharmonic Oscillator ,” Phys. Rev. Lett. 0031-9007 10.1103/PhysRevLett.47.1349 , 47 , pp. 1349 – 1352 . Li , Q. S. , 2003 , “ Vibratory Characteristics of Timoshenko...

.... Associate Editor: A. A. Ferri. 04 July 2002 27 January 2004 07 09 2004 bifurcation oscillations vibrations A two-degree-of-freedom impact oscillator is shown in Fig. 1 . The mass M 1 with forced excitation impacts against a rigid wall A when its...

... oscillations of the surrounding fluid. The discretization procedure exploits Green’s theorem and exposes two different gyroscopic effects underpinning the coupled system dynamics: One describes the gyroscopic coupling between the disk and acoustic oscillations, and another arises from the disk rotation...

...Y. Ketema An oscillator where the restoring force is furnished by a viscoelastic bar and therefore depends on the history of the motion is considered. The history-dependent force is characterized by a relaxation modulus and a relaxation time. Assuming that the relaxation time is small...

... integro-differential equations perturbation techniques oscillations Shallow arches are common structural members widely used either in civil engineering (e.g., bridges) or in mechanical and aerospace engineering as subelements of more complex structures. More recently, they are being...

... displacement and energy levels, respectively. These properties are used to describe the response in terms of its probability density function and its spectral density function. An example demonstrates the accuracy in predicting change of frequency and damping of a parametrically excited oscillator, and another...

... are not constant. Thus, free response is not represented by discrete standing waves but by traveling waves, and a given phase of oscillation travels along the string. String tension and nonzero instantaneous transverse velocity at the moving boundary results in energy variation. When the string undergoes...

...B. Wu; P. Li This paper deals with nonlinear oscillation of a general single-degree-of-freedom system. By combining the linearization of the governing equation with the method of harmonic balance, we establish two analytical approximate formulas for the period. These two formulas are valid...

...N. Sri Namachchivaya; H. J. Van Roessel In a recent paper an asymptotic approximation for the moment Lyapunov exponent, g p , of two coupled oscillators driven by a small intensity real noise was obtained. The utility of that result is limited by the fact that it was obtained under the assumption...

... be averaged over the period of free undamped oscillation, T E , treating E as a constant during this period and setting Φ = Φ 0 . The equations of motion then become (22) E ˙ Φ ˙ = − ε 2 Λ 1 − ε 2 Λ 2 + γ + β...