摘要
轴系的回旋振动是影响船舶安全、稳定和持续运行的重要因素之一。本文以某轴系试验平台为对象,研究不同校中状态对其回旋振动的影响。根据该轴系试验平台的实际尺寸建立其有限元模型,以此为基础进行直线校中计算。以艉轴承上负荷最小为目标函数,采用IWO算法进行轴系双向优化校中,使得轴承位置优化后艉轴承上负荷明显减小。基于轴承支撑结构,运用雷诺方程计算轴承支撑油膜压力分布及其刚度特性,依此建立ANSYS计算的轴承支撑模型,计算和对比该轴系试验平台的不同校中状态对其回旋振动的影响,为在优化轴系校中过程中减小轴系回旋振动提供了一定的理论支撑。
The whirling vibration of shafting is one of the important factors that affects the safety stability and sustainable operation of ships.With a shafting testing platform taken as a study object,the effect of different shafting alignment states on its whirling vibration was studied in this paper.The finite element model of the shafting testing platform was established according to its actual size,the calculation of its linear alignment was carried out.The minimum load on the stern bearing was taken as the objective function,the IWO algorithm was applied to calculate dual-optimization alignment for the shafting,and the load on the stern bearing was decreased obviously after shafting dual optimal alignment.According to the structure of bearing support,the pressure distribution and stiffness of the oil film in the support bearings were calculated by using Reynolds equation,the bearing support model was established for use in ANSYS calculation based on these results.The effects of the different alignment conditions of the shafting testing platform on its whirling vibration were calculated and compared,which provides some theoretical support for reducing the shafting vibration in the process of optimizing its alignment.
作者
刘金林
赖国军
姜忠龙
曾凡明
LIU Jin-lin;LAI Guo-jun;JIANG Zhong-long;ZENG Fan-ming(College of Power Engineering,Naval University of Engineering,Wuhan 430033,China;Unit 91404 of PLA,Qinhuangdao 066001,China)
出处
《船舶力学》
EI
CSCD
北大核心
2022年第2期264-273,共10页
Journal of Ship Mechanics
基金
湖北省自然科学基金资助项目(2014CFB453)
海军工程大学基础研究自主立项项目(20161519)。
关键词
有限元
轴系校中
回旋振动
支撑刚度
finite element
shafting alignment
whirling vibration
support stiffness
