偏载下大长径比水润滑轴承分布式动特性参数识别方法  

Distributed Dynamic Characteristic Parameter Identification Method of Water Lubricated Bearing with Large Aspect Ratio under Partial Load

作　　者：程奇志 欧阳武[2,3] 黄志伟 彭伟才[4] 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)

机构地区：[1]武汉理工大学船海和能源动力工程学院,湖北武汉430063 [2]武汉理工大学交通与物流工程学院,湖北武汉430063 [3]国家水运安全工程技术研究中心,可靠性工程研究所,湖北武汉430063 [4]中国舰船研究设计中心船舶振动噪声重点实验室,湖北武汉430064

出　　处：《润滑与密封》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)。

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°.

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 

分 类 号：TH137[机械工程—机械制造及自动化]