Bearing Fault Feature Information Extraction And Intelligent Recognition Of SVM

Fatigue problem is everywhere in our life, affecting our lives, even to human brought serious economic losses and casualties, so the fatigue problem has received the widespread attention. With the progress of science and technology and the development of material science, all kinds of materials with special performance are used in aerospace, agricultural technology, satellite, medical industry and other important fields. For fatigue study of these new materials has become the focus of attention. There are many factors can affect the component fatigue characteristic, Modern component tends to complicate, diversification, is no longer continuous component geometry, always contains a variety of gap. The gap is the main part of stress concentration, so the gap effect has become the key factors influencing the fatigue life. The predecessors have the research and theoretical basis of the system. But for under complex conditions, special materials to make the gap of the component is still very lacking on fatigue problems study.In this paper, starting from engineering applications, the system study of fatigue properties of the hysteresis alloy gap axis. Combined with the special magnetic hysteresis material, the research on magnetic field and external forces under the joint action of hysteresis material mechanical properties and appearance of change and its fatigue process. This paper studies the main content is as follows:1.Hysteresis alloys notched shaft under the force of magnetic coupling stress analysis. Hysteresis material in additional magnetic field under the action of show the special magnetic properties, the study found that the different direction of the magnetic field can change the internal structure of material, which affect the stress state and fatigue properties of materials. When the magnetic field direction is consistent with the direction of maximum principal stress components, hysteresis alloys notched shaft notch root stress level has not changed much; When the magnetic field direction and the maximum principal stress direction is vertical component, its stress level significantly decreased the notch root.2.In this paper, using ANSYS finite element software to establish a finite element model of notched specimens Hysteresis alloy gap axis after being magnetized, under the action of torque load, the stress concentration in the vicinity of notch root level has obvious drop, magnetic treatment improved the fatigue performance of materials. Experimental results show that after being magnetized, gap parameters on the stress distribution of the notch root still have an impact Notch depth and notch tip radius is larger influence on stress field. With the increase of hole depth and tip radius, the corresponding stress increased. Little change in the gap opening angle of impact.