基于有限元模型的船用螺旋桨桨叶应力分析

采用计算流体动力学(Computational Fluid Dynamics,CFD)软件建立静止域(舵、导管及船体)和旋转域(螺旋桨)的三维几何模型,在螺旋桨流场内求解雷诺平均纳维-斯托克斯方程(Reynolds-Averaged Navier-Stokes equations,RANS),由此对船用螺旋桨产生的推力和转矩特性进行数值模拟。对比分析在压载工况和满载工况下螺旋桨桨叶的压力分布、沿不同轴的受力情况和绕不同轴的转矩情况,为轴系弹性校中提供更加准确可靠的应力情况,对船用螺旋桨的生产设计提供有益的参考。

Stress Analysis of Marine Propeller Blade Based on Finite Element Model

The three-dimensional geometric models of static region (rudder, pipe and hull) and whirling region (propeller) are built with the Computational Fluid Dynamics (CFD) software, and the Reynolds-Averaged Navier-Stokes equations (RANS) are solved in the propeller flow field, thus the characteristics of thrust and torque generated by the marine propeller are numerically simulated. The pressure distribution, forces along different axes and torques around different axes of propeller blade under the ballast condition and full load condition are compared and analyzed, which provides more accurate and reliable stress for the shafting elasticity alignment, and provides beneficial reference for the production and design of marine propeller.