基于弯扭耦合的轴系瞬态分析和疲劳寿命计算

Transient Analysis and Fatigue Life Calculation of Shaft System Based on Bend-Torsion Coupling

传统船型的大型化、轴系两相邻轴承间距增大和推进功率增加,使轴系疲劳寿命降低。对船舶推进轴系疲劳寿命进行研究,对于船舶设计具有重要的理论意义和实际工程应用价值。我们基于ANSYS Workbench平台,建立弯扭耦合部分实体模型,得到工作转速下的瞬态分析结果,将其导入ANSYS Ncode中进行弯扭耦合下的疲劳计算分析,为轴系进一步设计优化和使用避免发生疲劳破坏提供了理论依据。

Conventional ship type of large-scale, shafts of two adjacent bearing spacing increases and propulsion power increases, so that shaft fatigue life is reduced. The research on the fatigue life of the ship propeller shaft is of great theoretical significance and practical engineering application value for ship design. Based on the ANSYS Workbench platform, this paper establishes the solid model of the coupling part of the bending and torsion, obtains the transient analysis result under the working speed, and introduces it into ANSYS Ncode for fatigue analysis under bending and torsional coupling. It is further designed to optimize and use the shaft Fatigue damage provides a theoretical basis.