多载荷联合作用下含缺陷结构载荷比计算

Calculation to Load Ratio of Defective Structure in Multi-loads Combination Conditions

载荷比是开展含缺陷结构常规安全评定的必需参数。实际工况下结构多承受多载荷联合作用,但多载荷下含缺陷结构的载荷比计算还无确切方法。提出了适用于多载荷联合作用下含缺陷结构载荷比计算的单位球方法,并利用弹塑性有限元技术,以环向穿透裂纹弯管为例,对单位球方法的模型假设条件进行了验证。

The load ratio is a required parameter in safety assessment of defective structures. Under actual working conditions, the defective structures are usually subjected to multi-loads combination. However, the calculation methods of load ratio have not been available in the condition of multi-loads. The unit sphere method suitable for multi-loads conditions was raised. By elastic-plastic method, the assumption of unit sphere model was validated in the case of elbow with circumferential through crack.