钢制薄壁外压圆筒的可靠性稳定系数

Reliability Buckling Safety of Thin Steel-Walled External Pressure Vessel

应用基于概率统计理论的可靠性方法 ,对钢制薄壁圆筒形外压容器的临界失稳压力进行了分析 ,认为临界失稳压力实测值与理论预测值之比是符合正态分布的随机变量 ;从设计、制造、检验、操作和安全监察等角度 ,讨论了有关因素对临界失稳压力的影响 ,运用强度 -载荷干涉模型 ,定量分析了设计公式置信度、常规稳定系数。

By using reliability method based on intensity-load interference model, the critical pressure in buckling of thin steel-walled external pressure is statistically analyzed, the results show that the ratio of experimental and calculated values of the critical pressure in buckling is stochastic variables in accordance with normal distribution. Dispersion parameter is analyzed from different quarters of design, manufacture, test, check before acceptance, safe supervise and operation. The fixed connection is abstaining what confidence limit of design formula, reliability buckling safe factors convention buckling safe factor.