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为研究内压荷载作用下材料参数不确定性对CPR1000安全壳结构实际性能的影响,对CPR1000安全壳结构建立了三维非线性有限元模型。按照欧洲标准、中国标准和某安全壳实测数据给出的材料随机参数,利用蒙特卡罗方法形成较大的安全壳计算模型样本空间。分析各个模型样本内压荷载作用下的破坏模式,根据给定的安全壳结构性破坏准则,进行易损性分析,进而比较按照欧洲标准、中国标准设计的安全壳和某实际安全壳内压荷载作用下的概率意义下的安全性能。计算结果表明,某实际安全壳的内压载荷下的安全性高于按中国标准设计的安全壳,低于按欧洲标准设计的安全壳。
In order to study the effect of material parameter uncertainty on the actual performance of CPR1000 containment under internal pressure, a three-dimensional nonlinear finite element model of the containment of CPR1000 was established. According to the random parameters of material given by European standard, Chinese standard and the measured data of a certain containment, the Monte Carlo method is used to form a large sample space for the model of containment. The failure mode under the internal pressure of each model sample is analyzed. According to the given failure criterion of containment structure, the vulnerability analysis is carried out, and then the safety shell and a practical containment internal pressure load designed according to European standards and Chinese standards are compared. Under the action of the probability of safety performance. The calculation results show that the safety of an actual containment under internal pressure load is higher than that of a containment designed according to Chinese standard and lower than that of a containment designed according to European standards.