船舶艉部结构对尾轴振动特性影响研究

发布时间：2018-02-16 11:47

本文关键词： 船舶尾轴艉部结构振动耦合动力学模型　出处：《船舶工程》2016年10期 　论文类型：期刊论文

【摘要】：船舶大尺度效应造成船体变形大,使船舶轴系和船体之间相互耦合、相互影响等问题十分突出。为此,建立了具有非线性油膜力作用的尾轴—油膜—艉部结构耦合系统动力学模型,推导了系统的动力学微分方程并对方程进行求解,分析了不同转速下尾轴的非线性动力学特征,总结了艉部结构系统的固有频率、参振质量、支承刚度、连接刚度对尾轴振动特性的影响。结果表明,考虑艉部结构的影响之后,尾轴—艉部结构耦合系统的振动特性发生了较大改变,耦合程度受艉部结构固有频率影响较大,尾轴最大振幅随艉部结构参振质量和支承刚度的变化而发生改变。
[Abstract]:The large scale effect of ship causes the large deformation of ship hull, which makes the ship shafting and ship hull coupling and influencing each other, etc., so the problems such as coupling and mutual influence between ship shafting and hull are very prominent. In this paper, the dynamic model of the coupling system of the tail shaft, oil film and stern structure with nonlinear oil film force is established. The dynamic differential equation of the system is derived and solved. The nonlinear dynamic characteristics of the tail shaft under different rotational speeds are analyzed. The effects of natural frequency, damping mass, supporting stiffness and connection stiffness on the vibration characteristics of stern shaft are summarized. The results show that, after considering the influence of stern structure, The vibration characteristics of the coupling system of stern shaft and stern structure have changed greatly, the coupling degree is greatly affected by the natural frequency of stern structure, and the maximum amplitude of tail shaft changes with the change of vibration mass and supporting stiffness of stern structure.
【作者单位】：浙江海洋大学港航学院;
【基金】：浙江省自然科学基金资助(LY16E090003)
【分类号】：U661.44

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