大口径射电望远镜轮轨滚动接触有限元分析  

Finite Element Analysis of Wheel-on-track Rolling Contact for Large Aperture Radio Telescope

作　　者：师洪强 许谦[2,3,4] 王娜 王兆军[1] Shi Hongqiang;Xu Qian;Wang Na;Wang Zhaojun(School of Physics and Technology, Xinjiang University, Urumqi 830046, China;Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi 830011, China;Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing 210033, China;Key Laboratory of Xinjiang Radio Astrophysics, Urumqi 830011, China)

机构地区：[1]新疆大学物理科学与技术学院,新疆乌鲁木齐830046 [2]中国科学院新疆天文台,新疆乌鲁木齐830011 [3]中国科学院射电天文重点实验室,江苏南京210033 [4]新疆射电天体物理重点实验室,新疆乌鲁木齐830011

出　　处：《天文研究与技术》2022年第2期95-102,共8页Astronomical Research & Technology

基　　金：国家自然科学地区基金(11563008);国家自然科学天文联合基金(U1731135);新疆维吾尔自治区天山雪松计划(2020XS12);中国科学院“西部之光”人才培养引进计划(2017-XBQNXZ-B-024);新疆维吾尔自治区天山创新团队计划(2018D14008);中国科学院天文台站设备更新及重大仪器设备运行专项;中国科学院青年创新促进会(Y202019);新疆维吾尔自治区天池百人计划(2017);新疆射电天体物理重点实验室专项资助.

摘　　要：通过显式有限元法建立轮轨滚动接触模型,用于分析110 m口径射电望远镜滚轮经过焊缝时的应力变化。建模时不仅考虑焊缝处材料的差异,同时还考虑轨道焊缝处表面不平度和摩擦系数的影响,分析了滚轮经过轨道焊缝时轮轨间作用力的瞬态响应。采用层级细分技术对轮轨模型进行网格划分,静力学分析结果表明模型求解精度较高。将网格划分模型用于瞬态分析发现,焊缝处表面不平度对轮轨间作用力影响较大,使轮轨间米赛斯(Mises)应力增加了约20%,可能对轨道长期可靠服役带来一定的隐患,因此,需要定期对轨道的状态进行检测与维护,保障轨道的长期可靠服役。Based on wheel-on-track rolling contact model which is established by explicit finite element method,the stress variation about the wheel of 110-meter aperture radio telescope passing through the welding joint is analyzed.When modeling,not only the material difference at the welding joint,but also the influence of the flatness and friction coefficient at the track welding joint are considered.According to the model,when the wheel passing through the welding joint,the transient response of the force between wheel and track is analyzed.The hierarchical subdivision technology is used to preprocess the wheel-on-track model,and the results of static analysis show that the model has high precision.The transient analysis results show that,the Mises stress is increased by about 20%due to the track flatness,which may bring some hidden danger to the track′s long-term reliable service.Therefore,it is necessary to inspection and maintenance the status of the track regularly to ensure the long-term reliable service characteristics of the track.

关 键 词：射电望远镜 方位轨道 滚动接触 瞬态响应 有限元法 

分 类 号：P111.44[天文地球—天文学]