CAJ | 학술논문

滚动体通过局部表面损伤时轴承的运动参数及动力学响应是轴承疲劳损伤分析和故障诊断的有效输入和重要依据。基于 GUPTA 轴承模型构建具有局部表面损伤的滚动球轴承的完整动力学模型。该模型中每个轴承元件(滚球、内圈及外圈)具有6个自由度，并且考虑了元件之间的相对滑动和润滑牵引特性。在对局部表面损伤进行建模时，完整考虑了损伤出现后由于材料缺失而引入的额外间隙，以及损伤对赫兹接触刚度及接触载荷作用方向的影响。研究滚球在通过局部表面损伤时轴承的加速度与滚球/损伤之间冲击力的对应关系，以及轴承转速和损伤宽度对轴承振动响应的影响规律。仿真结果表明，由于考虑了相对滑动和滚球/损伤之间冲击力的影响，本模型能够对具有局部表面损伤的球轴承进行更为合理的动力学特性分析，可为滚动球轴承的疲劳损伤分析和故障定量诊断提供一定的理论依据。
곤동체통과국부표면손상시축승적운동삼수급동역학향응시축승피로손상분석화고장진단적유효수입화중요의거。기우 GUPTA 축승모형구건구유국부표면손상적곤동구축승적완정동역학모형。해모형중매개축승원건(곤구、내권급외권)구유6개자유도，병차고필료원건지간적상대활동화윤활견인특성。재대국부표면손상진행건모시，완정고필료손상출현후유우재료결실이인입적액외간극，이급손상대혁자접촉강도급접촉재하작용방향적영향。연구곤구재통과국부표면손상시축승적가속도여곤구/손상지간충격력적대응관계，이급축승전속화손상관도대축승진동향응적영향규률。방진결과표명，유우고필료상대활동화곤구/손상지간충격력적영향，본모형능구대구유국부표면손상적구축승진행경위합리적동역학특성분석，가위곤동구축승적피로손상분석화고장정량진단제공일정적이론의거。
Vibration responses and kinematic parameters when a ball rolls over and impacts with a localized surface defect can provide efficient inputs and theoretical foundations for bearing fatigue analysis and fault diagnosis. A dynamic model for rolling ball bearings with localized defects is proposed based on GUPTA model. In this model, every bearing component (i.e., rolling ball, inner raceway and outer raceway) has 6 degrees of freedom. Relative slippage and lubricant traction are also considered. Moreover, defects are modeled completely with consideration of additional clearance due to material absence, changes of Hertzian contact stiffness and changes of contact force directions. The relationships between bearing accelerations and impact forces at balls and defects are analyzed. Furthermore, the effects of the shaft speed and the defect width on bearing vibrations are investigated. The simulation results show that, because the relative slippage and the impact force effect are all considered, the proposed model is capable of simulating the dynamic characteristics of rolling ball bearings with surface defects more reasonable and providing valuable conclusions for fatigue analysis and quantitive diagnosis of rolling ball bearings.