应用随机有限元法分析受损伤人字型变电构架的可靠性  

The application of stochastic finite element method in analyzing the reliability of weakened λ-shaped power-transformed frames

作　　者：张猛[1] 李天[1] 

机构地区：[1]郑州大学土木工程学院,河南郑州450002

出　　处：《河南科学》2003年第3期299-303,共5页Henan Science

摘　　要：采用随机有限元方法对受损伤的变电站人字型变电构架进行了可靠性计算分析。分析中主要考虑了材料和荷载的不确定性以及构件的损伤。分析结果表明,用随机有限元计算受损伤的人字型变电构架的随机响应是可行的。利用计算出的随机响应量的统计参数,在假定其分布后,可以用一次二阶矩法估算结构控制截面的可靠度指标,进而可以讨论损伤对构架控制截面可靠度指标的影响,并为下一步的模糊综合评判奠定了基础。This paper adopts stochastic finite element method to calculate and analyze the reliability of weakened λ-shaped power-transformed frames. The uncertainties of materials and loads as well as the weaknesses of members are mainly taken into account in analysis. The analytic results has shown that it is practicable to calculate the stochastic response of weakened λ-shaped power-transformed frames with the stochastic finite element method. After assuming the distributions of the calculated statistic parameters of the stochastic responses, the indices of reliability of critical sections in structures can be estimated with first power-second moment method. Then a further discussion on the influences towards the frames' critical sections' indices of reliability caused by the weaknesses can be taken, and the foundation for the next step' s ambiguous syntheses judgement has been established accordingly.

关 键 词：变电站 随机有限元方法 人字型变电构架 可靠性 构件损伤 

分 类 号：TM63[电气工程—电力系统及自动化] TU31[建筑科学—结构工程]