摘要
焊接结构质量分级评定存在大量的不确定性,主要表现为各种焊接缺陷的模糊性.文中运用模糊数学原理,提出了焊接质量模糊综合评判模型,根据国家标准GB3323—2005,建立了焊缝质量分类因素集、评判集及权重向量,并进行模糊综合评判.按最大隶属度原则,确定焊缝质量等级,从而对焊缝疲劳寿命进行定量修正.最后以BS7608-1993英国钢结构疲劳设计与评估使用标准及实际算例,说明了基于质量模糊评判模型的焊缝疲劳寿命评估流程.结果表明,该计算模型可行,计算结果合理.
The fuzzy comprehensive evaluation model of the welding quality is introduced based on the principle of fuzzy mathematics. According to GB3323-2005 standard, the weld quality classification factor set, the evaluation set and the weight vector are established, and fuzzy comprehensive evaluation is completed. In accordance with the principle of the largest degree of membership, the level of weld quality is determined, the livability of S-N curve have objective choice, so that the quantity of weld fatigue life is amended. Finally, by BS7608-1993 fatigue design and assessment of steel structures standard and actual example, the fuzzy evaluation model based on the quality of the weld fatigue life evaluation process is explained, and the results show that the model is feasible, the calculation results are reasonable.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2010年第8期49-52,共4页
Transactions of The China Welding Institution
基金
铁道部科技研究开发基金资助项目(2009J005-C)
中国博士后科学基金资助项目(20090461163)
关键词
焊接质量
模糊评判
疲劳评估
weld quality
fuzzy evaluation
fatigue assessment
