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| Accelerating Factor Modeling of Ultraviolet Radiation Aging Test of Train Surface Coating |
| Received:January 10, 2020 Revised:February 15, 2020 |
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| DOI：10.7643/issn.1672-9242.2020.06.007 |
| KeyWord:train coating ultraviolet radiation aging accelerating factor |
| Author | Institution |
| SU Xing-tao |
Beijing Institute of Applied Meteorology, Beijing , China |
| CHEN Kai-feng |
Xiamen Branch of Luoyang Ship Material Research Institute, Xiamen , China |
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| Abstract: |
| The work aims to establish an objective and quantitative calculation model for the accelerating factor in simulated ultraviolet radiation test of train surface coating in the laboratory. Taking the Lanzhou-Wulumuqi High-speed Railway as an example, a modeling scheme was designed. The main steps included the following:selecting modeling train stations, determining site meteorological geographic divisions, calculating the impacting distance of site environmental variables, establishing site solar radiation environmental spectrum and setting up the solar radiation environmental spectrum due to first-level meteorological geographic division, second-level meteorological geographic division and full-scale railway respectively. Finally, an accelerating factor model was established. Based on NASA Surface Meteorology and Solar Energy (SSE) ground solar radiation data and laboratory conditions, the accelerating factor in the ultraviolet radiation aging test of the train surface coating of the Lanzhou-Wulumuqi High-speed Railway was calculated to be about 9.5. The problem of calculating the accelerating factor of the ultraviolet radiation aging test of the equipment across a large area is solved due to above-mentioned modeling scheme of ultraviolet radiation aging test. It is simple and practical and can be extended to the surface coating of similar equipment such as airplanes, ships and automobiles, and evaluation of UV exposure test of other materials such as metals. |
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