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Amplitude modulation of the time-heteronymous – parametric stiffness function in gear mesh in the dynamic analysis of high-parametric transmission systems
Hortel, Milan ; Škuderová, Alena
For the reliability assurance of mechanical systems generally is necessary their perfect dynamic analysis. By the transmission systems with kinematic couplings – gears – is above all needful the analysis of internal dynamics of these with time-heteronymous weakly and strongly non-linear systems, especially in the area of the high-speed light and highly stressed systems. The contribution deals with the influence of the amplitude modulation of the resulting stiffness function in the gear mesh or its modified form in the conditions of the impact effects on the internal dynamics especially in the pseudoplanetary transmission systems with the split power flow. The numerical simulation of the mathematical-physical model of one branch of the power flow of the pseudoplanetary transmission system is carried out in the technical computing environment MATLAB/Simulink.
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Investigation of friction effect on a blades model
Půst, Ladislav ; Horáček, Jaromír ; Veselý, Jan
The blades model consists of two steel beams with rectangular cross-sections, fixed to the masive block. A loading device for normal force in the friction contact, exciting system and variouspickups togeteher with accessory apparatuses for evaluation and recordng completes the measurement set-up. The dynamic stiffnes, lost energy and equivalent coefficient of damping were ascertained. The found influences of normal force, excitation apmplitude and frequency on the reduction of both beams vibration amplitudes form a base for optimal destign of friction elements.
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To the analysis of the bearing stiffness influence on the amplitude frequency characteristic of the gear wheels
Hortel, Milan ; Škuderová, Alena
To the analysis of the bearing stiffness influence on the amplitude frequency characteristic of the gear wheels.This contribution deals with the theory of planar steady damped oscillation of the isolated pair of spur gear, which is in two orthogonal direction elastically suspended. The analysis of the periodical solution was carried out by means of transformation of the differential boundary-value problem to the integral problem with the successive approximation and simulation method. The purpose is the determination of the bearing stiffness influence on the dynamic force in gearing mesh.
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