| 基于EIFS和P-M的海底管道腐蚀疲劳寿命预测 |
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| 引用本文： | 李修波,余建星,谭玉娜,冯志强,韩翔希,符 妃.基于EIFS和P-M的海底管道腐蚀疲劳寿命预测[J].海洋工程,2019,37(1):84-92. |
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| 作者姓名： | 李修波 余建星 谭玉娜 冯志强 韩翔希 符 妃 |
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| 作者单位： | 天津大学水利工程仿真与安全国家重点实验室;高新船舶与深海开发装备协同创新中心;钦州学院机械与船舶海洋工程学院 |
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| 基金项目： | 国家科技重大专项资助项目(2016ZX05028005-004);国家自然科学基金青年基金(51609169) |
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| 摘 要： | 鉴于腐蚀疲劳损伤的特殊性,研究了点蚀过程和腐蚀疲劳裂纹扩展过程。基于等效初始缺陷尺寸(EIFS)和线性累积损伤理论(P-M)方法,消除了点蚀形核、蚀坑生长及腐蚀疲劳短裂纹扩展对腐蚀疲劳寿命预测的影响;避免了基于单点蚀坑建立的腐蚀疲劳寿命预测表达式的弊端;合理地简化了随机荷载下腐蚀疲劳寿命的预测流程。利用现有试验数据,对基于EIFS和P-M方法建立的腐蚀疲劳寿命预测表达式进行了模型验证。结果显示,所提模型的有效性和合理性得到了验证,为工程实际中海底管道的腐蚀疲劳寿命预测提供了一种可行方法。
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| 关 键 词： | 腐蚀疲劳 等效初始缺陷尺寸 P-M 疲劳寿命 海底管道 随机荷载 |
Corrosion fatigue life prediction of submarine pipe based on EIFS and P-M |
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| LI Xiubo,YU Jianxing,TAN Yun,FENG Zhiqiang,HAN Xiangxi and FU Fei.Corrosion fatigue life prediction of submarine pipe based on EIFS and P-M[J].Ocean Engineering,2019,37(1):84-92. |
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| Authors: | LI Xiubo YU Jianxing TAN Yun FENG Zhiqiang HAN Xiangxi and FU Fei |
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| Institution: | State Kay Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;
Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240, China,State Kay Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;
Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240, China,State Kay Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;
Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240, China,Institute of Mechanical and Marine
Engineering, Qinzhou University, Qinzhou 535011, China,Institute of Mechanical and Marine
Engineering, Qinzhou University, Qinzhou 535011, China and Institute of Mechanical and Marine
Engineering, Qinzhou University, Qinzhou 535011, China |
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| Abstract: | According to the specificity of corrosion fatigue damage, the pitting process and the corrosion fatigue crack propagation process were studied separately. Based on the equivalent initial defect size (EIFS) and the linear cumulative damage (P-M) methods, the effects of pitting nucleation, pit growth, and corrosion fatigue-induced small crack propagation on the prediction of corrosion fatigue life are eliminated; the drawbacks of the expression of predicting corrosion fatigue life based on a single pit are avoided; and the prediction process of corrosion fatigue life under random load is rationally simplified. Based on the existing experiments, the model of corrosion fatigue life prediction based on the EIFS and P-M methods is verified. The results show that the rationality and accuracy of the proposed model are verified, and a feasible method for predicting the corrosion fatigue life of submarine pipe in practical projects is thus provided. |
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| Keywords: | corrosion fatigue EIFS P-M corrosion fatigue life submarine pipe random load |
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