LUT_IR研究单元&专题: 体育教学研究部http:///ir.lut.edu.cn:80/handle/2XXMBERH/385462024-03-28T15:13:45Z2024-03-28T15:13:45ZCharacteristics of vibration response of ball bearing with local defect considering skiddingTian, YuYan, ChangfengLiu, YaofengLuo, WeiKang, JianxiongWang, ZonggangWu, Lixiaohttp:///ir.lut.edu.cn:80/handle/2XXMBERH/1670122023-12-21T02:27:07Z2023-12-21T02:19:55Z题名: Characteristics of vibration response of ball bearing with local defect considering skidding
作者: Tian, Yu; Yan, Changfeng; Liu, Yaofeng; Luo, Wei; Kang, Jianxiong; Wang, Zonggang; Wu, Lixiao
摘要: The occurrence and aggravation of local defects in ball bearings are closely linked to the skidding behavior of the ball. Previous studies have given less attention to investigating the impact of localized defects on the problem of bearing skidding. To investigate the dynamic response of defective bearings due to skidding, a dynamic model of the ball bearing is developed that considers various factors, including self-rotation, revolution, and radial motion of the ball, as well as the contact forces and friction forces of ball/cage and ball/race, time-varying displacement excitation, and elastohydrodynamic lubrication (EHL). Experimental signals collected from a machinery fault simulator test rig are used to validate the accuracy of the proposed model. The impact of race defects on the vibration characteristics of the bearing is analyzed, and the patterns of variation in contact and friction forces within one cycle of inner race rotation are described. The results indicate that the presence of defects intensifies the force fluctuation of the ball and causes it to deviate from its normal rolling condition. By comparing the skidding characteristics of a healthy bearing with a defective one under slippage, local defects will increase the skidding ratio of bearings. The proposed model can investigate the impact of race defects on the vibration response of ball bearings under the skidding condition.2023-12-21T02:19:55ZExploring kaon induced reactions for unraveling the nature of the scalar meson a0(1817)Wang, Xiao-YunZhou, Hui -FangLiu, Xianghttp:///ir.lut.edu.cn:80/handle/2XXMBERH/1667882023-11-22T07:26:11Z2023-11-22T07:26:10Z题名: Exploring kaon induced reactions for unraveling the nature of the scalar meson a0(1817)
作者: Wang, Xiao-Yun; Zhou, Hui -Fang; Liu, Xiang
摘要: In this work, we investigate the production of isovector scalar meson a(0)(1817) by the effective Lagrangian approach. Specifically, we employ the Reggeized t channel Born term to calculate the total and differential cross sections for the reaction K- p -> a(0)(1817)Lambda. Our analysis reveals that the optimal energy range for detecting the a(0)(1817) meson lies between W = 3.4 GeV and W = 3.6 GeV, where the predicted total cross section reaches a minimum value of 112 nb. Notably, the t channel, as predicted by the Regge model, significantly enhances the differential cross sections, particularly at extreme forward angles. Furthermore, we investigate the Dalitz processes of 2 -> 3 and discuss the feasibility of detecting the a(0)(1817) meson in experiments like J-PARC.2023-11-22T07:26:10Z普通高校开展12min跑教学的改革设想田宇http:///ir.lut.edu.cn:80/handle/2XXMBERH/1641502023-08-14T03:43:39Z2023-08-14T03:43:38Z题名: 普通高校开展12min跑教学的改革设想
作者: 田宇
摘要: 12min跑是提高心肺机能的最简单、实惠、有效的长距离慢跑,目前,被越来越多的学校在教材中采用,教学处于探索阶段。本人通过对12min跑教学的体会,指出存在的一些问题,并对这些问题进行阐述加以解决。2023-08-14T03:43:38Z对体育教学评价人文化发展的思考张虎祥张胜林http:///ir.lut.edu.cn:80/handle/2XXMBERH/1641402023-08-14T03:43:28Z2023-08-14T03:43:28Z题名: 对体育教学评价人文化发展的思考
作者: 张虎祥; 张胜林
摘要: 注重人文教育与重视体育学科教育的人文性是现代体育教育的重要发展趋势。未来的教育评价将以人文化为最高价值追求,以实证化为方法途径,向人文化和实证化共生共融的方向发展。学校体育的功能应更多体现在促进学生人文精神的生长方面。2023-08-14T03:43:28Z对普通高校现行体育选修课教学与管理探讨张君http:///ir.lut.edu.cn:80/handle/2XXMBERH/1641392023-08-14T03:43:26Z2023-08-14T03:43:26Z题名: 对普通高校现行体育选修课教学与管理探讨
作者: 张君
摘要: 本文对普通高校现行体育选修课在教学和管理中的有利因素与存在的问题进行了探讨,并提出了一些针对性的建议,旨在使普通高校体育选修课的教学与管理更加合理,更加完善。2023-08-14T03:43:26Z竞走教学及常见错误动作分析张胜林http:///ir.lut.edu.cn:80/handle/2XXMBERH/1641352023-08-14T03:43:23Z2023-08-14T03:43:23Z题名: 竞走教学及常见错误动作分析
作者: 张胜林
摘要: 通过对竞走技术的分析,结合教学体会,本文作者探讨了竞走的教学步骤、方法以及初学者在练习竞走时容易出现的错误动作等,希望能对竞走教学和训练提供参考。2023-08-14T03:43:23Z从“人文奥运”视角看高校体育文化建设张泽军程山http:///ir.lut.edu.cn:80/handle/2XXMBERH/1641332023-08-14T03:43:21Z2023-08-14T03:43:21Z题名: 从“人文奥运”视角看高校体育文化建设
作者: 张泽军; 程山
摘要: 北京奥运会的成功举办为体育文化的进一步宣传搭建了良好的平台,借2008年北京奥运会成功举办的契机,各高校应该结合自身特点和条件,充分利用体育资源,发挥自身优势,加强校园体育文化建设,从而推动整个校园文化的和谐发展。2023-08-14T03:43:21Z意境引导教学法在健美操教学中的应用研究白洁陈祎晟http:///ir.lut.edu.cn:80/handle/2XXMBERH/1641302023-08-14T03:43:17Z2023-08-14T03:43:17Z题名: 意境引导教学法在健美操教学中的应用研究
作者: 白洁; 陈祎晟
摘要: "意境引导教学法"是进行课堂教学改革的一种探索,本文针对健美操教学中存在的问题进行了分析,提出了运用"意境引导教学法"解决健美操教学艺术性缺失的问题,并对"意境引导教学法"在教学中的应用作了有益的探讨。2023-08-14T03:43:17Z对高校大学生篮球裁判员培养问题的若干思考高玉洲http:///ir.lut.edu.cn:80/handle/2XXMBERH/1641292023-08-14T03:43:16Z2023-08-14T03:43:16Z题名: 对高校大学生篮球裁判员培养问题的若干思考
作者: 高玉洲
摘要: 目前在高校篮球运动项目中,裁判员的队伍建设与高校的篮球发展水平极不相称。本文针对在培养高校篮球竞赛裁判员中出现的问题进行分析和研究,提出在培养过程中应注意的方式与方法,为今后培养高校学生篮球裁判员工作提供一些理论依据。2023-08-14T03:43:16Z如何预防篮球课堂教学中的运动损伤张君孙刚贾淑欣http:///ir.lut.edu.cn:80/handle/2XXMBERH/1641282023-08-14T03:43:15Z2023-08-14T03:43:15Z题名: 如何预防篮球课堂教学中的运动损伤
作者: 张君; 孙刚; 贾淑欣
摘要: 篮球运动具有激烈的竞争性和对抗性,在篮球课堂教学中,教师应根据篮球运动的特点,了解常见运动损伤的理论,掌握预防运动损伤的措施,保护学生的身心健康。2023-08-14T03:43:15Z