| FPSO典型焊接接头残余应力释放数值预报 |
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| 引用本文： | 李良碧.FPSO典型焊接接头残余应力释放数值预报[J].海洋工程,2009,27(2):46-53. |
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| 作者姓名： | 李良碧 |
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| 作者单位： | 江苏科技大学,船舶与海洋工程学院,江苏,镇江,212003;中国船舶科学研究中心,江苏,无锡,214082 |
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| 基金项目： | 中国留学基金委和挪威研究理事会联合资助项目 |
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| 摘 要： | 浮式生产储油卸油船(FPSO)经历满载和卸载,油船试验和多变的波浪载荷.此时结构中较高的初始残余应力常常已被释放,很大程度上影响了此类结构疲劳强度估算准确性.应用三维弹塑性有限元方法模拟FPSO典型焊接接头的残余应力释放,并用试验数据进行验证.对结构在变幅循环载荷下的残余应力释放进行研究,得到相关的残余应力释放预报公式.从而为提高FPSO在实际载况下疲劳强度估算准确性提供有价值参考.
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| 关 键 词： | 焊接接头 残余应力释放 预报 疲劳荷载 |
| 收稿时间： | 2008/7/15 0:00:00 |
| 修稿时间： | 2008/12/25 0:00:00 |
A prediction formula of residual stress relaxation for typical weld joints of FPSOs |
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| YUAN Lin,GONG Shun-feng,JIN Wei-liang,LI Zhi gang and ZHAO Dong -yan.A prediction formula of residual stress relaxation for typical weld joints of FPSOs[J].Ocean Engineering,2009,27(2):46-53. |
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| Authors: | YUAN Lin GONG Shun-feng JIN Wei-liang LI Zhi gang and ZHAO Dong -yan |
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| Institution: | 1.School of Naval Architecture and Ocean Engineering;Jiangsu University of Science and Technology;Zhenjiang 212003;China;2.China Ship Scientific Research Center;Wuxi 214082;China |
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| Abstract: | FPSOs often experience overall loading and offloading,oil tanker tests and various wave-induced loads,and high initial residual stresses are expected to cause the residual stresses relaxations,which affect the accuracy of fatigue strength calculation of these typical structures to a great degree.Hence,in the paper,the residual stress relaxation of the typical weld joints of FPSOs is simulated with 3-D elastic-plastic finite element analysis;moreover,it is validated through experimental data.Afterwards,the r... |
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| Keywords: | FPso |
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