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结构的稳定分析分为一类稳定分析和二类稳定分析,二类稳定分析中需要对结构施加缺陷,现在的做法通常是将第一类稳定分析得到的一阶屈曲模态折减一定的比例施加到无缺陷模型上。显而易见,缺陷值和稳定分析结果是相关的。为了保证稳定分析结果的可信度,本文提出了一个概念:二类稳定分析前需进行缺陷敏感性分析。然后根据结构的缺陷敏感度以及缺陷值大小,综合判断二类稳定结果可信度。
The structural stability analysis is divided into one type of stability analysis and two types of stability analysis, and the second type of stability analysis needs to impose defects on the structure. The current practice usually reduces the first-order buckling mode obtained from the first type of stability analysis by a certain proportion Apply to defect-free model. Obviously, the value of the defect is related to the results of the stability analysis. In order to ensure the credibility of the stable analysis results, this paper presents a concept: Defect sensitivity analysis is required before the second type of stability analysis. Then according to the structure of the sensitivity of the defect and the size of the defect value, comprehensively determine the credibility of the two types of stable results.