中文摘要：

研究优化船舶推进轴系孔径比的取值范围,使轴系的综合力学性能达到最理想的状态,目的是在船舶设计时帮助船舶设计者快速确定轴系的最佳孔径尺寸。以某散货船的轴系为研究对象,在考虑船舶螺旋桨偏心力的情况下,建立了轴系危险截面的等效应力和抗扭强度的数学模型,运用ANSYS有限元分析软件,对不同孔径比艉轴的危险截面的等效应力和抗扭强度进行了对比分析,并进行了校中情况对比分析研究。将理论值和实测值进行对比,发现理论值和实测结果拟合得非常好。对比研究发现,船舶轴系的综合力学性能比较优越的孔径比范围是0.21～0.28,在此范围内,轴系校中效果也比较好。该研究结论为船舶轴系的设计提供了分析依据。

英文摘要：

The range of the aperture ratio of marine propulsion shafting is optimized by this study, which will put the mechanical properties of the shaft system to the most ideal state. The purpose is to help the ship designers to determine the optimal size of the shaft system in a ship design quickly. Taking the shaft system of a bulk cargo ship as the research object, the mathematical model of equivalent stress and torsional strength of the shafting dangerous cross-section is established by considering the ship propeller eccentric force. Using ANSYS software, the equivalent stress and torsional strength of the dangerous section of the stern shaft of different aperture ratio are compared and analyzed, and the shafting alignment is also analyzed and researched. The theoretical and experimental results fit well by comparing the theoretical and the measured values. Through the comparison, the aperture ratio range of the great comprehensively mechanical properties of the ship shaft system is 0.21～0.28. The shafting alignment effect is also better in this range. This study provides a conclusion for the design of marine shafting.