[1]赵仕伦,陈超核,姜永,等.计及板厚腐蚀的半潜式平台疲劳裂纹扩展评估[J].哈尔滨工程大学学报,2019,40(08):1406-1413.[doi:10.11990/jheu.201807107]
 ZHAO Shilun,CHEN Chaohe,JIANG Yong,et al.Fatigue crack growth assessment of semisubmersibles based on plate thickness diminution[J].hebgcdxxb,2019,40(08):1406-1413.[doi:10.11990/jheu.201807107]
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计及板厚腐蚀的半潜式平台疲劳裂纹扩展评估(/HTML)
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《哈尔滨工程大学学报》[ISSN:1006-6977/CN:61-1281/TN]

卷:
40
期数:
2019年08期
页码:
1406-1413
栏目:
出版日期:
2019-08-05

文章信息/Info

Title:
Fatigue crack growth assessment of semisubmersibles based on plate thickness diminution
作者:
赵仕伦 陈超核 姜永 沈义俊
华南理工大学 广东省船舶与海洋工程技术研究开发中心, 广东 广州 510000
Author(s):
ZHAO Shilun CHEN Chaohe JIANG Yong SHEN Yijun
Naval Architecture and Ocean Engineering R & D Center of Guangdong Province, South China University of Technology, Guangzhou 510000, China
关键词:
半潜式平台裂纹扩展板厚腐蚀疲劳评估失效评估图疲劳裂纹增长增长率裂纹评估
分类号:
U674.38
DOI:
10.11990/jheu.201807107
文献标志码:
A
摘要:
针对半潜式平台疲劳裂纹剩余扩展寿命的计算和预测问题,本文在计及板厚腐蚀的前提下,针对半潜式平台立柱与横撑连接部位的疲劳裂纹进行扩展评估。依照规范选取合适板厚减小系数,利用指数速率模型计算板厚20 a后的腐蚀余量,输入剩余板厚尺寸进行结构整体和局部的响应分析。利用波浪散布数据与传递函数获得离散化的随机疲劳载荷,应用裂纹扩展率单一曲线模型进行裂纹扩展计算,在扩展循环中加入失效评估图FAD进行安全评估,计算得出的裂纹临界尺寸与寿命均比完整板厚下的数值小,而应用单一恒定幅值载荷加载的裂纹扩展寿命比离散化随机载荷加载的数值小。结果表明:在海洋平台结构响应分析中计入板厚腐蚀的影响,利用离散化方式处理随机疲劳载荷与应用FAD进行裂纹扩展安全评估,能提高评估过程及计算结果的合理性。

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备注/Memo

备注/Memo:
收稿日期:2018-7-27。
基金项目:国家重大科研仪器研制专项项目(11627802).
作者简介:赵仕伦,男,博士研究生;陈超核,男,教授.
通讯作者:陈超核,E-mail:chenchaohe@scut.edu.cn.
更新日期/Last Update: 2019-08-05