Bearing play a pivotal role in rotating machinery. Failure analysis of the bearing is mostly studied by creation of artificial defect on various elements of the bearing and analysis is made with vibration signature tool for monitoring its condition. As localized bearing fault grows, becoming a distributed one, generate random signal with non-stationary components. In present paper effect of surface roughness on the vibration response of outer race of the ball bearing is analysed. Vibration spectrum produced by the single roughness defect under pure radial load at various locations on outer race of bearing is studied. Effect of roughness size, speed and load on the vibration response has been investigated. Results are presented in time and frequency domain. The experimental results are compared with ball pass frequency of outer race. Frequency response obtained from the experimental results is found identical with the theoretical ball pass frequency of outer race.
The ball lock separation mechanism is used in space vehicles. Various parts of space vehicles have to be separated during flight, to jettison burnt out rocket stages and components that are no longer needed, to uncover equipment, or to deploy payloads. In this paper the detailed analysis of a "Ball Lock release mechanism" designed to meet customer specific conditions is presented. Multi-body simulation of mechanism is carried out by using MSC Adams, to assess the displacement, velocity, acceleration, forces and torques acting on released body attached to payload and parent vehicle. Finite Element analysis is employed to assess the contact stresses between Ball and rings in the most heavily loaded zone, which gives the contact deformation and Stress contours.
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