V型无压载水船舱口角隅疲劳寿命计算新方法

Novel Research on the hatch corner's fatigue life of a V-shape non-ballast water ship

摘要: 提出一种计算V型无压载水船这种特殊船型结构疲劳寿命的新方法,该方法不受船型、航区航线及分析部位的限制,具有通用性。通过结合综合海洋决策支持系统(Integrated marine decision support system)提供的海浪数据,采用Matlab编程,得到只属于所计算船的特定的散布图和营运特性表。然后,通过SESAM软件计算在该营运特性表下的载荷,采用ABAQUS建模计算热点应力。最后,计算结构的疲劳寿命。结果表明,经过舱口优化后,无压载水船舱口角隅的疲劳寿命要高于母型船。

Abstract: A novel method to calculate the hatch corner's fatigue life of the V-shape non-ballast ship is proposed in this paper.The proposed method comprehensively studies the wave data provided by integrated marine decision support system, from which both the scatter diagram and operational profile are obtained through programming.The load for the operational profile is calculated with SESAM and the hot spot stress is acquired through ABAQUS modeling.Finally, the structural fatigue life is calculated.It is concluded that the hatch corner's fatigue life of the V-shape non-ballast ship is extended after hatch optimization.