舷外海水动压力和货物压力非对称特性的讨论  

Discussion on the Asymmetric Behaviours of External Dynamic Sea Pressure and Internal Cargo Pressure

作　　者：张爱年[1] 胡毓仁[1] 

机构地区：[1]上海交通大学船舶及海洋工程学院,上海200030

出　　处：《船舶力学》2001年第5期36-42,共7页Journal of Ship Mechanics

摘　　要：舷外海水和舱内货物对舷侧和船底结构的动压力是船体承受的非常重要的疲劳载荷。在船体结构疲劳强度校核中 ,为合理选择校核点并准确计算疲劳损伤 ,必须掌握其变动范围及其分布形式。由于液体压力和货物压力的单向性质 ,舷外海水动压力和货物舱内压力的变动是非对称的。文中讨论了舷外海水动压力和舱内货物压力的非对称特性 ,在此基础上给出了舷外海水动压力范围和舱内货物压力的定义 ,指出了舷外海水动压力范围最大值出现的位置。External dynamic sea pressure and cargo pressure acting on the side shell and bottom of the hull are important fatigue load of ships. In order to determine the location of the checking point and to estimate the fatigue damage accurately in fatigue strength assessment of ship structures, it is necessary to know the variation range of the external dynamic sea pressure and cargo pressure and its distribution along the hull contour. Since the fluid pressure and cargo pressure can only apply towards a surface in the normal direction, variation of the external dynamic sea pressure and cargo pressure is asymmetric. The asymmetric behaviours of the external dynamic sea pressure and cargo pressure are discussed. On this basis, definitions of the external sea pressure range and cargo pressure are derived.

关 键 词：船体结构 疲劳强度 疲劳载荷 舷外海水动压力 货物压力 

分 类 号：U661.43[交通运输工程—船舶及航道工程]