首页 | 本学科首页   官方微博 | 高级检索  
     

试验台约束对滑动轴承动特性识别精度的影响
引用本文:陈润霖,唐杰,徐帆,杜辰,崔亚辉,刘凯. 试验台约束对滑动轴承动特性识别精度的影响[J]. 润滑与密封, 2024, 49(3): 189-195
作者姓名:陈润霖  唐杰  徐帆  杜辰  崔亚辉  刘凯
作者单位:西安理工大学机械与精密仪器工程学院
基金项目:国家自然科学基金项目(11802232);陕西省重点研发计划项目(2022GY-209);中国博士后科学基金项目(2021MD703875)
摘    要:在滑动轴承的动特性测试中,试验台参数对动特性测试精度有重要的影响。以某倒置式轴承动特性试验台为研究对象,基于轴承动力学正反问题,提出滑动轴承动特性系数识别精度的仿真评估方法,分析不同激振频率时试验台约束参数对轴承动特性系数识别精度的影响规律,并对激振频率和约束参数的取值范围进行优选。结果表明:在较低激振频率的条件下,当约束刚度和约束阻尼取值较小时,动特性系数的识别精度受测试误差的影响不大,随着约束刚度和约束阻尼取值增大到一定值,动特性系数的识别精度受测试误差的影响迅速增大。针对研究的试验台,选择激振频率在30~300 Hz之间,选择试验台约束刚度小于试验轴承刚度的0.3%,试验台约束阻尼小于试验轴承阻尼的7%时,能够保证较好的轴承动特性系数的测试精度。

关 键 词:滑动轴承试验台;约束刚度和阻尼;轴承动特性系数;识别精度

Influence of Test Bench Constraint on Identification Accuracy of Dynamic Characteristic of Sliding Bearing
CHEN Runlin,TANG Jie,XU Fan,DU Chen,CUI Yahui,LIU Kai. Influence of Test Bench Constraint on Identification Accuracy of Dynamic Characteristic of Sliding Bearing[J]. Lubrication Engineering, 2024, 49(3): 189-195
Authors:CHEN Runlin  TANG Jie  XU Fan  DU Chen  CUI Yahui  LIU Kai
Abstract:In the dynamic characteristic test of sliding bearing,the test-bed parameters have an important influence on the test accuracy.An inverted dynamic characteristic test rig was taken as the research object,and a simulation evaluation method for the identification accuracy of the dynamic characteristic coefficient of the sliding bearing was proposed based on the forward and reverse problem of bearing dynamics.The influence of the constraint stiffness and constraint damping of the test bench on the identification accuracy of the dynamic characteristic coefficient of the bearing at different excitation frequencies was analyzed,and the range of excitation frequency and constraint parameters was optimized.The results show that at lower excitation frequencies,when the constraint stiffness and constraint damping of the test bench are small,the identification accuracy of the dynamic characteristic coefficients is not significantly affected by testing errors.As the constraint stiffness and constraint damping increase to a certain value,the identification accuracy of the dynamic characteristic coefficients is rapidly increased by the influence of the test errors.For this studied test bench,when selecting an excitation frequency between 30 Hz and 300 Hz,selecting the test bench constraint stiffness less than 0.3% of the test bearing stiffness,and the test bench constraint damping less than 7% of the test bearing damping,a good testing accuracy of the bearing dynamic characteristic coefficient can be ensured.
Keywords:sliding bearing test rig  constraint stiffness and damping  bearing dynamic characteristic coefficients  identification accuracy
点击此处可从《润滑与密封》浏览原始摘要信息
点击此处可从《润滑与密封》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号