Method for controlling anisotropic vibration of torsional vibration shaft system

Abstract

The invention provides a method for controlling anisotropic vibration of a torsional vibration shaft system. The mechanism of the torsional vibration and anisotropic vibration of shaft system mainly explains that the reason of generating anisotropic vibration is that symmetric branch structures exist in the torsional vibration shaft system and is provided with a plurality of same inherent frequencies, in the corresponding modes of vibration with same inherent frequencies, the amplitudes of the symmetrical structures are far greater than that of other parts of the torsional vibration shaft system. A method of implementing specific control measure is that the torsional vibration shaft system is designed to be a nonsymmetrical torsional vibration structure, so that different torsional dampers can be configured for the torsional vibration shaft system, and the inertia or torsional rigidity can be changed. In order to guarantee that the system is provided with enough torsional strength and the weight is not increased, the shapes of parts of same weights can be changed to obtain different inertias, so that the anisotropic vibration of the torsional vibration shaft system can be conveniently and effectively controlled. In a concentric symmetric gear system, a load regulating method is adopted to change the meshing stiffness so as to change torsional rigidity, so that the inherent frequency of the anisotropic vibration is adjusted to achieve an aim of controlling the anisotropic vibration.

Description

(1) Technical field [0001] The invention relates to a shafting torsional vibration anisotropic vibration control method, which belongs to the field of power engineering. (2) Background technology [0002] In the field of power engineering, multi-machine paralleling is an economical method of increasing power, and the application of V-type machines is becoming more and more extensive. These systems all have a shafting torsional vibration system with a symmetrical structure. Due to the torsional vibration of the shafting with a symmetrical structure, the torsional vibration is likely to cause severe vibration and bring harm to the safety of the structure. [0003] Li Bozhong was the first person in my country to study the anisotropic vibration of symmetrical structures. In the mid-1970s, the team he led published a series of papers on the vibration (ie polarization) of symmetrical structures under asymmetric excitations. [1] Li Bozhong et al. Polarization problem of V-type eng...

AI Technical Summary

Problems solved by technology

In a high-speed transmission system, the speed of the prime mover rises from zero to the rated speed. If the frequency of the anisotropic vibration of the concentric symmetrical reduction device cannot avoid the speed range of the prime mover, this type of device cannot be used, and it is difficult for the entire transmission system to achieve high power. density

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