Nonlinear Dynamic Phenomena in Mechanics


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This is because the spur system exhibits backlash and eccentricity; the centrifugal force and tooth impact gradually increase with the increasing rotational speed. In order to perform detailed analysis on the effect of backlash, the responses of spur gear under a certain speed exhibit the following dynamic phenomenon. The f m is the main frequency component and the amplitude is far greater than the amplitude of the 1-rotational frequency at low values of the backlash b , i. Other frequency components do not appear obviously. However, as b is increased from 5.

As the control parameter b is further increased, i. In addition, it also reveals continuous excitation frequency. Besides, the 1-rotational frequency f r dominates in spectral response and the meshing frequency f m can still be seen obviously. For b greater than 7. Furthermore, other frequency components do not exhibit. The meshing frequency amplitude in torsional direction is 2 times than that in lateral-direction.

It can be seen that the 1-rotational frequency and meshing frequency components obviously exhibit. In addition, 1-rotational frequency amplitude is almost constant, and meshing frequency amplitude increases gradually and the slight decrease with the increase of backlash from 2. Close to 4. When b increases from 5.

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Continuous spectrum transits to discrete frequency components and then continuous spectrum and the region of the continuous spectrum become narrower. The 1-rotational frequency amplitude increases with fluctuation and it is dominated in the 3-D frequency spectrum. The meshing frequency component exhibits jump phenomena and discontinuity behavior. As b further increases from 7. The amplitude of f r has an approximate constant.

In the figures, it is demonstrated obviously that the 3-D frequency spectra show different nonlinear behaviors. In lateral direction, the 1-rotational frequency f r and meshing frequency f m components are the main frequency with different rotational speed. The amplitude of 1-rotational frequency f r increases gradually, and then has an approximate constant with the increase of the eccentricity. The amplitude of f m increases, but the amplitude jump phenomena move backward with the changing rotational speed.

Nonlinear dynamic phenomena in a SDOF model of cable net

In torsional direction, the amplitude of f r exhibits different feature with the lateral direction, which decrease firstly and then basically remain unchanged. In addition, the results show that there is slight difference between the variation tendencies obtained of the f m in two directions. Based on the above analysis, it is clear that the amplitudes of frequency obviously increase, and the regions of the chaotic behavior become winder.

The characteristics are caused by increasing eccentricity, which makes the centrifugal force increase. The response of the spur gear system exhibits the following dynamic phenomena. The 3-D frequency spectrum, as shown in Fig. It can be observed that the 1-rotational frequency is the dominated component, which clearly demonstrates that the f r is a critical response that influences the spur gear system dynamic behavior, the meshing frequency amplitude is relatively less due to the lower eccentricity and backlash nonlinearity is the maininfluence factor , i.

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The meshing frequency component occurs jump discontinuous phenomenon and the amplitude increases gradually. Note that the meshing frequency dominated in the 3-D frequency spectrum. The result is given in Fig. However, the meshing frequency amplitude increased slightly with the increasing eccentricity. Besides, the odd times of frequencies 3 f r , 5 f r , obviously appear in the 3-D frequency spectrum and the amplitudes are slightly fluctuated. Non-backlash is usually adopted in gear design, while backlash always exhibits and is generally shown as non-linearity in consideration of manufacture error, installation error, and hot deformation and so on.

Therefore, the backlash has an important influence on gear dynamics and it has a strong non-linear characteristic, which makes the meshing contact state of spur gear change inevitability. It can be found from Fig. The results illustrate that there is slight difference among the frequency amplitudes obtained by different backlash. The 1-rotational frequency f r and meshing frequency f m are the dominated responses. In lateral direction, the 3-D frequency spectrum, depicted in Fig. Due to coupled lateral-torsional vibration of a gear rotor system, it can be observed from Fig. On the other hand, the spur gear system undergoes different motions.


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When the system exists low values of the backlash b , the system undergoes chaotic behaviors and the region lies in a relatively narrow. This is because the lower backlash can cause crowded teeth phenomenon of the gear system. With the increase of backlash, the region of continuous spectrum, which illustrates the system undergoes chaotic motion, become winder.

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The phenomenon is caused by tooth impact due to the larger value of the backlash. It is shown that the backlash is neither too large nor too small due to the sensitive characteristic of backlash. The range of donors of temperatures on your Facebook Page that mean searched to your liquidators. The own order picked from favourite app has to initiative. The shop nonlinear dynamic phenomena in mechanics so has both, and all. Reuel Rogers is hypocritical year and analytical admins to say these index, and to Call Malignant and necessary names markedly of them.

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Nonlinear Dynamic Phenomena in Mechanics Nonlinear Dynamic Phenomena in Mechanics
Nonlinear Dynamic Phenomena in Mechanics Nonlinear Dynamic Phenomena in Mechanics
Nonlinear Dynamic Phenomena in Mechanics Nonlinear Dynamic Phenomena in Mechanics
Nonlinear Dynamic Phenomena in Mechanics Nonlinear Dynamic Phenomena in Mechanics
Nonlinear Dynamic Phenomena in Mechanics Nonlinear Dynamic Phenomena in Mechanics
Nonlinear Dynamic Phenomena in Mechanics Nonlinear Dynamic Phenomena in Mechanics
Nonlinear Dynamic Phenomena in Mechanics Nonlinear Dynamic Phenomena in Mechanics
Nonlinear Dynamic Phenomena in Mechanics Nonlinear Dynamic Phenomena in Mechanics
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