Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Research on performance degradation model of electrical connectors for fretting wear under random vibration
| DOI: | 10.11809/bqzbgcxb2024.08.005 |
| Keywords: | electrical connector; fretting wear; wear debris; electrical capacitance tomography; back propagation neural network |
| Abstract: | Aiming at the contact performance degradation of electrical connectors due to fretting wear under random vibration, this paper researched on the accumulation and distribution characteristics of wear debris between contacts during fretting wear caused by random vibration by capacitance tomography technology. The results show that the vibration time, random vibration level and load current have a positive cumulative effect on the accumulation of wear debris; the fretting wear is most severe under axial vibration; the distribution of wear debris is uneven, more debris at pin root; the contact resistance value R shows a fluctuating upward trend, different from the stepwise increase in the sum of wear debris characteristic value (ΔC), there shows a strong correlation between them under high random vibration level and load current. A slight difference exists in contact resistance during fretting wear under low load current and no load. The scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) analysis are basically consistent with the test results. The fretting wear performance degradation CS BP model is proposed based on the wear debris distribution information, and its prediction accuracy is less than 6%. |
| Issue: | Vol. 45 No. 8 (2024) |
| Published: | 2024-09-02 |
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