Damage Analysis Of Sliding Electric Contact Rail Based On Strain Mode

The sliding electric contact structure is usually in the electrical connection of equipment, the reliability of the contact and the health of the electric contact elements directly relate to the stability of the equipment. Due to the electrical contact element for a long time in strong current and high speed friction conditions, using process is prone to material aging, resulting in contact instability caused by arc erosion problems, wear defects or damage. If things go on like this, the equipment will be completely damaged,causing incalculable economic losses and safety accident. Therefore, it is very important to diagnose the damage of high speed sliding electric contact structure. In this paper, the damage detection and identification of high speed sliding electric contact power transmission system are studied.Based on the fiber Bragg grating sensor, a method of track damage identification based on the theory of strain modal analysis of vibration structure is studied.First of all, the layout method of fiber grating sensors is studied, and the demodulation technique of fiber grating and the strain mode theory of vibration are analyzed.Secondly, the corresponding variable damage identification method for modal simulation analysis, orbit simulation model was established by ANSYS simulation software, to simulate the damage conditions of the different track, and the track with different position and degree of damage strain mode of.Finally, this paper set up the experimental platform, with the application of fiber grating sensor on the track of damage diagnosis experimental strain modal damage identification method was studied, to verify the feasibility of the strain mode, the damage identification method.