海底油气管道剩余强度参数化建模方法研究  

RESEARCH ON PARAMETRIC MODELING METHOD FOR RESIDUAL STRENGTH OF SUBSEA OIL AND GAS PIPELINE

作　　者：周红明[1,2] 周闻青[1] 茅振华 吕超群[3] ZHOU HongMing;ZHOU WenQing;MAO ZhenHua;LV ChaoQun(Zhejiang Province Institute of Metrology, Hangzhou 310018, China;College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China;XiaoShan Institute of Measurement for Quality and Technique Supervision, Hangzhou 311202, China)

机构地区：[1]浙江省计量科学研究院,杭州310018 [2]浙江大学光电科学与工程学院,杭州310027 [3]萧山区质量计量监测中心,杭州311202

出　　处：《机械强度》2018年第2期444-448,共5页Journal of Mechanical Strength

基　　金：浙江省科技厅公益分析测试项目(2016C37055)资助~~

摘　　要：为了有效解决海底受损油气管道的安全性评估问题,先利用有限元方法分析管道剩余强度随缺陷长度、宽度、深度等几何量信息的变化规律,在此基础上构建了用于定量化描述管道剩余强度的参数化模型,并利用改进遗传算法的全局最优搜索能力求解模型未知系数,给出管道剩余强度与缺陷几何量之间的定量关系。经过实验验证,表明该模型比现有的管道评估标准具有更好的可靠性,可有效地用于海底油气受损管道的剩余强度分析,为管道的安全性评估提供理论依据。In order to solve the problem of safety assessment effectively for subsea oil and gas pipeline,the rules about pipeline residual strength changing with the defect geometric information such as length,width and depth were analyzed using finite element method（ FEM）,and on this basis the parameterized model of pipeline residual strength was obtained,and the unknown coefficients in the model were identified using improved genetic algorithm,thus the model can describe the quantitative relation between the residual strength and defect geometrical quantity. The experimental results show that the model is more reliable than the existing pipeline assessment criteria,it can be effectively used in residual strength analysis for subsea pipeline,the analysis results can provide theoretical basis for pipeline safety assessment.

关 键 词：海底油气管道 缺陷几何量 剩余强度 参数化模型 遗传算法 

分 类 号：TG174[金属学及工艺—金属表面处理]