Numerical Simulation of Fatigue Life of Lubricating Ball Bearing in Spacecraft
Typically,spacecraft are subjected to extreme conditions such as varying acceleration,vibration,shock,and temperature gradients.As a result,the fatigue life of solid lubricated ball bearings in spacecraft mechanisms is in-fluenced by numerous factors,making their numerical simulation complex and challenging.To address this issue,a nu-merical simulation method for the fatigue life of solid lubricated ball bearings in spacecraft mechanisms was presented.Firstly,the types of bearings and relevant structural parameters were determined.Meanwhile,variables such as bearing stress,yield stress,and strain rate were calculated in detail.Subsequently,a finite element model of the bearing was constructed.Furthermore,various experimental conditions were set to conduct numerical simulation tests on the fatigue life,thereby obtaining the fatigue damage law of the bearing.The analysis results demonstrate that the fatigue life of solid lubricated ball bearings in spacecraft mechanisms is related to factors such as bearing load,stress,speed,friction coefficient,and the size of the bearing itself.The fatigue life of the bearing decreases with increases in load,stress,speed,and friction,while it increases with the size of the bearing.
Spacecraft mechanismsSolid lubricated ball bearingsFatigue lifeNumerical analysisFinite ele-ment model
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