基于流固耦合的桨轴系统横向振动特性研究

Research on the lateral vibration characteristics of propeller-shaft system based on fluid-solid coupling

随着大型化、高速化船舶的发展,桨轴系统的工作负荷加重,尺寸增大,尾轴承的润滑状态会改变轴系的支撑特性,而对支撑系统敏感的横向振动也就更容易受到影响。以某实验室长轴系为研究对象,建立尾轴承实体模型,采用多点支撑,建立水润滑轴承的润滑特性模型,计算基于流固耦合的轴系横向振动特性,并与传统单点支撑的轴系横向振动计算进行对比。结果表明,基于流固耦合的轴系模型更能反映出真实的轴系振动特性。

With the development of large-scale and high-speed ships,the working load of propeller-shaft system becomes more massive,and the dimension increases,the Lubrication State of the tail bearing will change the supporting characteristics of shaft system.The lateral vibration,which is sensitive to the support system,is more easily affected.In this paper,the solid model of tail bearing is established,and the lubrication characteristic model of water-lubricated bearing is established by using multi-support.Compared with the traditional single-point support,the lateral vibration characteristic of the shaft system based on the fluid-solid coupling is calculated,and the fluid-solid coupling model can reflect closely the natural vibration characteristics of the shafting.