桂林理工大学学报2023，Vol.43Issue(4)：639-645,7.DOI:10.3969/j.issn.1674-9057.2023.04.012
水电站明钢管受力机制及加强构件的参数敏感性分析
Analysis on mechanical characteristics of reinforcement members and parameter sensitivity of exposed steel pipe in hydropower station
摘要
Abstract
The calculation models and typical sections of exposed penstocks in hydropower station are illustrated based on mechanical mechanism and the bearing characteristics.On the basis of the calculation models of ex-posed penstocks,stresses on four typical sections of exposed penstocks in hydropower station are analyzed by an-alytical and finite element methods.The similarities and differences between the two methods and the stress mechanism of the exposed penstocks are revealed according to contrastive analyzing stresses on the four typical sections of the exposed penstocks.The stress characteristics of the size of the supporting ring and stiffening ring are studied,and the influence of the supporting ring and stiffening ring on these two typical sections is analyzed and discussed.The results show that,with the increase of the ratio of height to thickness of supporting ring and stiffening ring,the Mises stress values of stiffening ring and supporting ring and their adjacent pipe wall ele-ments decrease gradually.Moreover,the stress of the supporting ring and stiffening ring of exposed penstocks in hydropower station is complex.Meanwhile,the equivalent stress values obtained by the analytical method are greater than the values obtained by the finite element method,and there are some unreasonable places.There-fore,it suggests that the finite element method should be used for the stress analysis of the exposed penstocks in hydropower station.关键词
明钢管/典型断面/受力机制/解析法/有限元法Key words
exposed penstock/typical sections/stress mechanism/analytical method/finite element method分类
建筑与水利引用本文复制引用
刘敬敏,杨岩岩,夏雨,郭杭岡..水电站明钢管受力机制及加强构件的参数敏感性分析[J].桂林理工大学学报,2023,43(4):639-645,7.基金项目
广西自然科学基金项目(2018GXNSFBA281186 （）
2020JJA160008) （）
广西科技基地和人才专项(桂科AD19245125) （桂科AD19245125）
柳州市科技计划项目(2021CBA0105) （2021CBA0105）
广西高校中青年教师科研基础能力提升项目(2019KY0375) （2019KY0375）
