The dimensionless characteristic amplitude of the working mass (DCAWM), the magnification coefficient of characteristic amplitude (MCCM), the maximum coefficient of vibration of material (MCVM), the force transfer coefficient between the vibration isolation frame and the foundation (FTCBVIFF), the synchronization ability coefficient (SAC), and the critical frequency ratio of vibration isolation mass(CFRVIM) are proposed to describe the performance of a three-mass vibrating machine. Effect of dynamic parameters of the system on the performance of the vibrating machine is investigated by numeric method. When the working mass operates at a state of supper resonance, the DCAWM and the FTCBVIFF decrease with the increase of frequency ratio of vibration isolation mass (FRVIM). At the FRVIM greater than the CFRVIM, with the increase of the FRVIM, the initial DCAWM and the maximum FTCBVIFF increase, and the MCCM and the MCVM decrease. Hence, the smaller the FRVIM is, the better the performance of the vibrating machine is. The smaller the exciting angle is, the bigger the synchronization ability coefficient of the two exciters is. When the supporting rigid body serves as the material box, the greater the mass ratio of the working mass and the exciter installation body is, the greater the mass ratio of the working mass and the exciter installation body is. The structural parameters of the system can satisfy the synchronization stable criterion. The computer simulation verifies the theoretical investigation results.
Key words
Vibrating system /
Vibration isolation /
Self-synchronization /
Stability
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