本文以某实际船舶推进轴系为研究对象，计入螺旋桨激振力大小和频率的影响，获得推进轴系发生振动时径向滑动轴承的承载状态，推导了径向润滑轴承承载力及液膜刚度的计算表达式，分析了螺旋桨激振力引起的推进轴系振动对径向润滑轴承承载特性的影响。结果表明，螺旋桨激振力会导致径向润滑轴承承载力及液膜刚度产生周期性的波动，不同加载频率前提下轴承承载特性表现各异，且重载条件下轴承承载特性的波动更为明显，必须合理设计轴承以提高轴承的承载能力，进而保证整个推进轴系的运行稳定性。
This paper takes the actual ship propulsion shafting as the research object, considers the influence of propeller excitation force magnitude and frequency, obtains the bearing state of the radial sliding bearing when the propulsion shafting vibrates, and deduces the expression of liquid film stiffness and bearing capacity of the radial sliding bearings, analyzes the effect of propulsive shaft vibration caused by propeller excitation on bearing characteristics of radial sliding bearings. The research results show that the propeller excitation force will cause the periodic fluctuating of bearing capacity and liquid film stiffness of the radial lubricated bearing. The bearing characteristics of the bearing are different under different load frequencies, and the bearing characteristics of the bearing are more fluctuating under heavy load conditions. Obviously, bearings must be properly designed to improve the bearing's bearing capacity, and thus ensure the stability of the entire propulsion shaft system.
2019,41(4): 71-75 收稿日期：2018-04-10
DOI：10.3404/j.issn.1672-7649.2019.04.014
分类号：U664.21
基金项目：国家自然科学基金资助项目（51375197）
作者简介：张新宝(1965-),男,博士,副教授,研究方向为精密机械设计与制造、推进轴系的合理校中工艺
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