摘要
为了解决偏载下大长径比水润滑轴承分布式动特性参数识别问题,建立水润滑轴承的两支点分布式动力学模型,提出水润滑轴承分布式动特性参数的识别方法,并验证该动特性识别方法的可靠性。通过仿真试验,引入加载和位移信号扰动对轴承分布式动特性参数识别的精度进行分析,开展偏载水润滑轴承分布式动特动特性试验。结果表明:随着激振力振幅扰动的增加,刚度和阻尼系数的识别误差线性增加;激振力相位扰动对刚度系数的影响较小,对阻尼系数的影响较大;随着位移幅值扰动的增加,刚度和阻尼系数的识别误差增加;位移信号的相位扰动对刚度系数的影响较小,对阻尼系数的影响较大;若要求刚度和阻尼的识别误差小于10%,则激振力和位移信号的扰动幅值应小于10%;若要求刚度和阻尼的识别误差小于20%,则这2个信号的扰动相位扰动偏差应小于1°。
In order to solve the problem of distributed dynamic characteristic parameter identification of water-lubricated bearings with large length-diameter ratio under partial load,the two-point distributed dynamic model of water-lubricated bearings was established,and the identification method of distributed dynamic characteristic parameters of water-lubricated bearings was proposed.Through simulation test,the accuracy of distributed dynamic characteristic parameter identification of bearings was analyzed by introducing load and displacement signal disturbance,and the distributed dynamic characteris⁃tic test of water-lubricated bearings with eccentric load was carried out.The results show that as the excitation force ampli⁃tude disturbance increases,the identification error of stiffness and damping coefficients increases linearly.The excitation force phase disturbance has a small impact on the stiffness coefficient,but a significant impact on the damping coefficient.As the displacement amplitude disturbance increases,the identification error of stiffness and damping coefficients increases.The phase disturbance of the displacement signal has a smaller impact on the stiffness coefficient,but a greater impact on the damping coefficient.If the identification error of stiffness and damping is required to be less than 10%,the disturbance amplitude of dynamic load and displacement signal should be less than 10%.If the identification error of stiffness and damping is required to less than 20%,the disturbance phase disturbance deviation of these two signals should be less than 1°.
作者
程奇志
欧阳武
黄志伟
彭伟才
CHENG Qizhi;OUYANG Wu;HUANG Zhiwei;PENG Weicai(School of Ocean and Eenrgy Power Engineering,Wuhan University of Technology,Wuhan Hubei 430063,China;School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan Hubei 430063,China;Reliability Engineering Institute,National Engineering Research Center for Water Transport Safety,Wuhan Hubei 430063,China;National Key Laboratory on Ship Vibration&Noise,China Ship Development and Design Center,Wuhan Hubei 430064,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2023年第11期194-199,共6页
Lubrication Engineering
基金
国家自然科学基金项目(52071244)。
关键词
偏载
大长径比水润滑轴承
分布式动特性
参数识别
仿真试验
partial load
water lubricated bearing with large aspect ratio
distributed dynamic characteristics
parameter identification
simulation test
作者简介
程奇志(1998-),男,硕士研究生,研究方向为水润滑轴承动特性。E-mail:306092@whut.edu.cn;通信作者:欧阳武(1987-),男,博士,教授,主要研究方向为船舶轴系工程。E-mail:ouyangw@whut.edu.cn。
