This paper addresses the assessment of the structural integrity of a rudder horn built of different materials and in particular, the material quality effects on the structural design of a typical rudder horn of a conventional Panama-Kamsarmax size ship in relation to IACS requirements. The minimum scantlings of the rudder horn were established and compared for different steels permitted in IACS UR S10. Furthermore, a FEA model of the rudder horn including its most critical part i.e. its connection to the hull structure was developed in order to calculate and compare stress and deflections under the IACS prescribed loading conditions. The findings suggest that the use of higher strength material may reduce substantially the fatigue life of the structure at the critical area of rudder horn to hull connection which may cause the initiation of cracking, with adverse impact to the safety of the ship and its crew.

本文针对由不同材料制成的舵角的结构完整性进行评估，尤其是与IACS要求相关的材料质量对常规巴拿马-Kamsarmax尺寸船的典型舵角的结构设计的影响。确定了舵角的最小尺寸，并比较了IACS UR S10允许使用的不同钢种。此外，为了计算和比较在IACS规定的载荷条件下的应力和挠度，还开发了舵角的FEA模型，包括其最关键的部分，即其与船体结构的连接。