摘要
应用数理统计方法对钢制薄壁外压圆筒的临界失稳压力进行分析 ,得到如下结论 :①在显著度为 5 %时 ,描述临界失稳压力实测值与预测值之比的随机变量符合正态分布。②在置信度为99%时 ,该随机变量分布参数为 ,均值 μr=0 .95 79,标准差Sr=0 .110 9,变异系数Cr=0 .115 8。
By using the method of statistics, the critical pressure in buckling for the thin steel walled external pressure vessel is analyzed. The results shows that:①The ratio of the critical pressure in buckling and the theortical expected value is a random variable with normal distribution,and with the marked of 5%②With the confidence limit of 99%,the distribution parameter of the random variable is obtained.
出处
《石油化工设备》
CAS
2004年第2期7-10,共4页
Petro-Chemical Equipment
关键词
外压容器
临界失稳压力
随机变量
分布参数
external pressure vessel
critical pressure in buckling
random variable
distribution parameter
