基于有限元的舰船推进轴系合理校中计算方法

Calculation Method for Ship Propulsion Shafting Alignment Based on Finite Element Analysis

推进轴系的合理校中直接关系到舰船推进系统运行和舰船航行的安全性与可靠性,因此,其计算方法的合理性和准确性是推进系统研究的重要内容之一。基于有限元分析,建立了舰船推进轴系合理校中计算模型,并计入了螺旋桨水动力、齿轮动态啮合力、轴承刚度、轴承变位、轴段剪切变形以及运行温度等因素对推进轴系校中的影响。以某型舰船的推进轴系为研究对象,采用所提出的方法进行了推进轴系冷态、热态以及安装状态的合理校中计算分析,并与Kamewa公司采用Shaft Analysis AB软件的计算结果进行了比对,平均计算偏差小于1.54%。

The propulsion shafting alignment directly affects the security and reliability of the propulsion system operation and the ship navigation,the rationality and accuracy of the alignment calculation method is important for propulsion system.In this paper,a propulsion shafting alignment method based on finite el ement analysis was proposed.The proposed method investigated the factors such as propeller hydrodynam ic force,gear dynamic meshing force,bearing stiffness,bearing displacement,shear deformation for the shafting and operation temperature.The alignment analysis was respectively performed under cold state,warm state and installation state for a propulsion shafting.The results of proposed method agree well with the calculation results of Shaft Analysis AB software in the same conditions,and the mean calculation er ror is less than 1.54%.