Institutional Repository of Radio Astronomy Research Laboratory
| A Study on the Mechanical Characteristics and Wheel-Rail Contact Simulation of a Welded Joint for a Large Radio Telescope Azimuth Track | |
Chen, Xiao1; Yin, Ruihua1; Yang, Zaitun1; Lan, Huiqing1; Xu, Qian2,3
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| 2024-05-01 | |
| Source Publication | BUILDINGS
 |
| Volume | 14Issue:5Pages:1300 |
| Contribution Rank | 2 |
| Abstract | The azimuth track is an important component of the radio telescope wheel-rail system. During operation, the azimuth track is inevitably subject to phenomena such as track wear, track fatigue cracks, and impact damage to welded joints, which can affect observation accuracy. The 110 m QiTai radio telescope (QTT) studied in this paper is the world's largest fully steerable radio telescope at present, and its track will bear the largest load ever. Since the welded joint of an azimuth track is the weakest part, an innovative welding method (multi-layer and multi-pass weld) is adopted for the thick welding section. Therefore, it is necessary to study the contact mechanical properties between the wheel and the azimuth track in this welded joint. In this study, tensile tests based on digital image correlation technology (DIC) and Vickers hardness tests are carried out in the metal zone (BM), heat-affected zone (HAZ), modified layer, and weld zone (WZ) of the welded joint, and the measured data are used to fit the elastic-plastic constitutive model for the different zones of the welded joint in the azimuth track. Based on the constitutive model established, a nonlinear finite element model is built and used to simulate the rolling mechanical performance between the wheel and azimuth track. Through the analysis of simulated data, we obtained the stress distribution of the track under different pre-designed loads and identified the locations most susceptible to damage during ordinary working conditions, braking conditions, and start-up conditions. The result can provide a significant theoretical basis for future research and for the monitoring of large track damage. |
| Keyword | azimuth track welded joint multi-layer and multi-pass wheel-rail contact mechanical property finite element model |
| DOI | 10.3390/buildings14051300 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Research and Development Program of China[2021YFC2203600] |
| WOS Research Area | Construction & Building Technology ; Engineering |
| WOS Subject | Construction & Building Technology ; Engineering, Civil |
| WOS ID | WOS:001234305700001 |
| Publisher | MDPI |
| Funding Organization | National Key Research and Development Program of China |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/6740 |
| Collection | 射电天文研究室_天线技术实验室 110米口径全可动射电望远镜（QTT）_技术成果 |
| Corresponding Author | Lan, Huiqing |
| Affiliation | 1.Beijing Jiaotong Univ, Key Lab Vehicle Adv Mfg Measuring & Control Techno, Minist Educ, Beijing 100044, Peoples R China 2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China |
| Recommended Citation GB/T 7714 | Chen, Xiao,Yin, Ruihua,Yang, Zaitun,et al. A Study on the Mechanical Characteristics and Wheel-Rail Contact Simulation of a Welded Joint for a Large Radio Telescope Azimuth Track[J]. BUILDINGS,2024,14(5):1300. |
| APA | Chen, Xiao,Yin, Ruihua,Yang, Zaitun,Lan, Huiqing,&Xu, Qian.(2024).A Study on the Mechanical Characteristics and Wheel-Rail Contact Simulation of a Welded Joint for a Large Radio Telescope Azimuth Track.BUILDINGS,14(5),1300. |
| MLA | Chen, Xiao,et al."A Study on the Mechanical Characteristics and Wheel-Rail Contact Simulation of a Welded Joint for a Large Radio Telescope Azimuth Track".BUILDINGS 14.5(2024):1300. |
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| Chen-2024-A Study on（12452KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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