Abstract Analysis of dynamic characteristics the defective bearing is significant for fault diagnosis machinery. At present, there are few researches on numerical modeling with roller. To solve this problem, explicit finite element method adopted in paper to establish a nonlinear model cylindrical roller spalling defects. In proposed model, flexibility all components, internal friction, relativ...

The nonlocal means (NL-Means) method that has been widely used in the field of image processing in recent years effectively overcomes the limitations of the neighborhood filter and eliminates the artifact and edge problems caused by the traditional image denoising methods. Although NL-Means is very popular in the field of 2D image signal processing, it has not received enough attention in the f...

Abstract—In this study the regional stability of a rotor system which is supported on rolling bearings with radial clearance is studied. The rotor is assumed to be rigid. Due to radial clearance of bearings and dynamic configuration of system, each rolling elements of bearings has the possibility to be in contact with both of the races (under compression) or lose its contact. As a result, this ...

Linear electro-mechanical actuators are finding increased use in the field of thrust vectoring of launch vehicles. Earlier, linear electro-hydraulic actuators were used especially in the lower stages of the launch vehicles where there is a requirement for large actuation forces. However, electro-mechanical actuators are being scrutinized for this purpose in an effort to provide lighter, cleaner...

Abstract Thermal characteristic is important performance of the bearing, which reflects friction characteristics bearing. bearing will change along with internal behavior when fails. There a very complex coupling relationship. It an implication for thermal analysis cylindrical roller considering thermo-mechanical coupling. A model heat generation established based on method quasi-static and net...

In order to accurately measure and evaluate the quality of roller profile ultra-long flexible blade bearing, an error evaluation model is established for arc segment straight based on least square method, then overall proposed these two models. Through simulation a standard wind turbine cylindrical it found that in this work can effectively contour line bearing’s roller. The absolute 0.0319 mm,...