计算机应用与软件2017，Vol.34Issue(4)：48-52,64,6.DOI:10.3969/j.issn.1000-386x.2017.04.009
井架主梁缺陷的随机有限元及扩展有限元分析
STOCHASTIC FINITE ELEMENT AND EXTENDED FINITE ELEMENT ANALYSIS OF DERRICK GIRDER DEFECTS
摘要
Abstract
Aiming at the problem of the stress concentration of the girder and the safety and reliability of the derrick during the use of the oil derrick, taking the K-type derrick as an example, the reduction of the strength of the girder and the corrosion wear are equivalent to the decrease of sectional area, and stochastic finite element method is used to analyze the sensitivity and reliability of the parameters.The extended finite element method is applied to the extension of girder fracture surface and the analysis of girder structural strength.The results show that the girder defects can reduce the reliability of the derrick, leading to the problem of girder stress concentration is more serious.The stress concentration of crack tip is the main factor of crack propagation, and the fracture surface will affect the displacement distribution around it.According to the results, the model is beneficial to predict the influence of girder defects on derrick reliability, and it can provide the basis for the analysis of girder crack propagation and decreasing risk of derrick incidents.关键词
井架/主梁/缺陷/可靠性/有限元Key words
Derrick/Girder/Defect/Reliability/Finite element分类
信息技术与安全科学引用本文复制引用
练章华,许定江,林铁军,敬佳佳,周兆明,万夫..井架主梁缺陷的随机有限元及扩展有限元分析[J].计算机应用与软件,2017,34(4):48-52,64,6.基金项目
国家自然科学基金项目(51574198). （51574198）
