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Noise analysis of nonlinear contact of rolling bearings

Author: ZhangChuang
Tutor: YinYuFeng
School: Taiyuan University of Science and Technology
Course: Mechanical Design and Theory
Keywords: Rolling bearings Nonlinear vibration Noise Numerical Analysis
CLC: TB535
Type: Master's thesis
Year: 2011
Downloads: 90
Quote: 0
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Abstract


Rolling bearings is the most widely used precision machinery parts , known as the industry 's joints . With the rapid development of the rolling bearing vibration and noise pollution of the environment and mute mechanical technology and its products continue to emerge , the host of the rolling bearing noise performance requirements are increasing , as soon as possible to find out the mechanism of bearing noise has become a top priority . Rolling noise mechanism is extremely complex , in the study of their properties , often for the calculation of the linear convenient to ignore many nonlinear factors , Rolling noise mechanism is still recognized yet mature bearing one of the basic theory . Start from an acoustic point of view , the key consideration Rolling structure nonlinear contact analysis of noise deep groove ball bearing mechanism mainly includes the following four areas: ( 1 ) based on a solid contact mechanics , the application of non- line the sexual dynamics theory of deep groove ball bearings vibration model , and the use of acoustic theory and structure of acoustic and acoustic radiation related knowledge , to construct the coupling noise model of deep groove ball bearings . 2 . Use matllab mathematical calculation software of different physical parameters affect the deep groove ball bearing noise , numerical analysis method , and analyzed the the bearing raceway different speeds , rolling body vibration velocity and vibration acceleration and noise sound the relationship between the pressure stage ; for the defects of the surface of the deep groove ball bearings , the analysis of the relationship between the wave number, lesion size , and other parameters and noise of the waviness . Adaptive control theory based on nonlinear system of deep groove ball bearing vibration and noise control , rolling bearings from the case by outside interference , adaptive to return to steady-state operation . With particle swarm optimization based on simulated annealing noise deep groove ball bearings are optimized , compared to the original design of the sound pressure level decreased by 13.3% and achieved significant results . This article opened up a new way of thinking for the rolling bearing vibration and noise mechanism , providing a new method . Laid a breakthrough technology bottlenecks rolling bearing low noise lay a solid theoretical foundation , and has played an important role in promoting the development of vibration and noise reduction for the bearing industry and reference .

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CLC: > Industrial Technology > General industrial technology > Acoustic engineering > Vibration, noise and its control > Vibration and noise control and its use
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