舰船推进轴系轴承载荷识别与标定方法  

Load identification and calibration method of ship propulsion shafting bearing

作　　者：刘祺霖 欧阳武[1,2,3] 闫琦隆 LIU Qi-lin;OUYANG Wu;YAN Qi-long(School of Transportation and Logistics Engineering,National Engineering Research Center for Water Transport Safety,Wuhan University of Technology,Wuhan 430063,China;State Key Laboratory of Maritime Technology and Safety,National Engineering Research Center for Water Transport Safety,Wuhan University of Technology,Wuhan 430063,China;Reliability Engineering Institute,National Engineering Research Center for Water Transport Safety,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学交通与物流工程学院,武汉430063 [2]武汉理工大学水路交通控制全国重点实验室,武汉430063 [3]武汉理工大学国家水运安全工程技术研究中心可靠性与新能源研究所,武汉430063

出　　处：《船舶力学》2023年第7期1075-1083,共9页Journal of Ship Mechanics

基　　金：国家重点研发计划项目(2018YFE0197600);国家装备预研领域基金项目(61402100402)。

摘　　要：针对目前舰船推进轴系轴承服役载荷与设计载荷差别大、现有轴承载荷识别方法精度低等问题,开展舰船推进轴系轴承载荷识别法的优化与精度提升研究。基于转轴应变信号建立推进轴系轴承载荷识别力学模型,提出综合有限元法与三弯矩法的轴系轴承载荷识别法的仿真验证方法,分析载荷识别精度的影响因素和影响规律,完成轴承载荷识别系统的标定试验,获得轴承载荷识别的修正模型。研究结果表明:轴承载荷识别值与三弯矩法计算值最大相对差小于3%;应变测试误差对轴承载荷识别精度的影响较大;识别模型中后尾轴承等效支点位置取值对相邻轴承的载荷识别值影响较为明显;载荷识别误差随应变修正系数增加存在先减小后增大的现象,当应变修正系数取值在1.08~1.11时,轴承载荷识别相对误差从10%减小到1%以下,识别精度得到大幅提升。In view of the large difference between the service load and the design load of the current ship pro-pulsion shafting bearing,and the low accuracy of the existing bearing load identification method,the research-es on optimization and accuracy improvement of the ship propulsion shaft bearing load identification method were carried out.Based on the shaft strain signal,a mechanical model for load identification of propulsion shafting bearing was established,a simulation verification method for the shaft bearing load identification method integrating the finite element method and the three-moment method was proposed,and the influenc-ing factors and influencing rules of load identification accuracy were analyzed.The calibration test of shaft bearing load identification system was conducted,and a revised model of bearing load identification was ob-tained.The results show that:(1)the maximum relative difference between the bearing load identification val-ue and the three-moment method value is less than 3%;(2)the strain test error has a great influence on the bearing load identification accuracy;(3)the value of the equivalent fulcrum position of the rear tail bearing in the identification model has a significant influence on the load identification value of the adjacent bearing;(4)when the strain correction coefficient is between 1.08 and 1.11,the relative error of bearing load identifi-cation decreases from 10%to less than 1%,greatly improving the identification accuracy.

关 键 词：舰船 推进轴系 径向轴承 载荷识别 标定 

分 类 号：U661.44[交通运输工程—船舶及航道工程]