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- Title
车载电缆终端内部缺陷的温度分布仿真研究.
- Authors
程高远; 安 钊; 张梦楠; 袁 庚; 徐 祥; 吴广宁
- Abstract
The distortion of the temperature field at the defect of the on-board cable terminal directly affects the operation safety of the on-board cable terminal, and the research on the temperature distribution at the defect of the on-board cable terminal plays a key role in ensuring the safe operation of the train. In this paper, the axial and radial temperature distribution of intact onboard cable terminal under normal working conditions is simulated and analyzed. Then, the axial and radial temperature distributions of the air gap, metal impurities and water vapor defects at the interface between the stress control tube and the main insulation layer of the onboard cable terminal under the same size are simulated and analyzed, and the temperature distribution characteristics of the onboard cable terminal with different defect sizes under the condition of air gap defects are analyzed. It is found that the internal defects of the onboard cable terminal will enhance the temperature distribution around the defects, and the influence of the defects on the surrounding temperature is related to the thermal conductivity of the defected material. The three-dimensional size of the air gap defect of the cable terminal will change the temperature distribution around the air gap defect, the maximum temperature difference at the defect can reach 48. 62k, and the air gap thickness can change the surrounding temperature more than the air gap length and width. This study provides a simulation basis for the temperature distribution around the internal defects of the actual onboard cable terminal, and has important practical engineering value to ensure the safety of train operation.
- Subjects
TEMPERATURE distribution; THERMAL conductivity; AIR conditioning; METAL inclusions; WATER vapor; AIR gap (Engineering); CABLE structures; TUBES
- Publication
Railway Standard Design, 2022, Vol 66, Issue 7, p149
- ISSN
1004-2954
- Publication type
Article
- DOI
10.13238/j.issn.1004-2954.202103200002