舰艇电力推进轴系多学科优化设计研究

Research on Multi-disciplinary Design Optimization for Marine Motor Driving Shafting

以电力推进轴系为对象,进行直线校中计算,得到各轴承负荷影响系数.基于CFD数值算法,计算考虑螺旋桨水动力的轴系校中特性,并对轴系校中特性进行优化.基于直线校中和合理校中两种状态,研究轴系不同校中状态对振动特性的影响.在此基础上,以后尾轴承垂向变位为变量,研究建立轴系校中特性及振动特性的多学科优化设计模型,为轴系设计质量的提高提供参考.

Reliability,stealth and other design indicators for marine shafting was decided by shafting alignment and vibration characteristics,both of which are coupled with each other.A motor driving shafting was taken as the research object,and its linear alignment calculation was carried out to obtain load coefficients of each bearing.Influence of propeller hydrodynamic force on the shafting alignment and tits optimization was studied,and influence of the state of shafting alignment on the vibration of the shafting was researched.Multi-disciplinary coupling optimization model was established,with the vertical displacement of the rear stern bearing of the shafting taken as a variable parameter.Solution of this model was obtained,which could provide a reference for improving the design quality of marine shafting.