内河船舶总纵强度安全指标与安全系数的研究

A Study of Safety Index and Safety Coefficient of Longitudinal Strength of Riverboat

以水准 2方法研究了内河船舶总纵强度安全指标与安全系数的对应关系 ,计算分析了各种因素对安全指标及安全系数的影响程度 ,并给出了一系列等值曲线图表 .根据内河船舶的统计资料 ,给出了相应于破坏概率为 1 0 - 4时 ,船舶在码头装卸货时静水弯曲应力的中心安全系数在 1 .5 5～ 1 .88之间 ,船舶在波浪上航行时总纵弯曲合成应力的中心安全系数在 1 .41 9～ 1 .

This paper studies the correspondence relation of safety index and safety coefficient of longitudinal strength of riverboat using the level 2 method, calculates and analyzes the effect of all factors on safety index, and presents a series of equal value curve charts. Finally, according to the statistical date of riverboat, under the condition of rupture probability 10 -4 , presents that the center safety coefficient of bending stress in still water is between 1.55 and 1.88 when ships are loading or unloading at wharfs and the center safety coefficient of longitudinal bending composite stress is between 1.419 and 1.481 when ships is voyaging on wave.