大型集装箱船高强度厚钢甲板安全寿命评估方法.pdf

第9卷第1期
中国舰船研究
Vol No
2014年2月
Chinese Journal of Ship Research
Feb.2014
doi:10.3969fisn.,1673-3185.2014.01.013
期刊网址
网络出版地址:http:/www.cnki.net/kcms/doi/10.3969/1ssn.1673-3185.2014.01.013.hn1
大型集装箱船高强度厚钢甲板安全寿命评估方法
王健,黄小平,崔维成
上海交通大学船舶海洋与建筑工程学院,上海200240
摘要:疲劳是船舶与海洋工程结构破坏的主要模式之一。高强度钢的应用使得结构的疲劳问题更加突出
对于派用以高强度厚钢板为甲板的大型集装箱船来说,有必要进行高强度厚钢板的焊接缺陷部位安全寿命评
估方法研究。以应力范闱的长期分布服从两参数 Weibull分布的随机载荷为疲劳载荷,裂纹扩展率采用单一曲
线模型预报裂纹在任意时刻的尺寸,结合应力强度因子并参考应力计算方法和失效评估图技术提出一套计算
集装箱船高强度钢厚钢板安全寿命评估的方法。通过编制计算程序,对某集装箱船甲板进行安全寿命计算
最后,分析疲劳載荷谱对安全寿命的影响。计算结果表明:载荷回复期的长短和 Weibull分布的形状参数的取
值都会极大影响结构疲劳安全寿命。
关键词:集装箱船;高强度厚钢板;疲劳载荷;裂纹扩展;安全寿命;失效评術
中图分类号:U651.43
文献标志码:A
文章编号:1673-3185(2014)01-91-08
Safety Life Assessment of Thick High Tensile Steel Plates on
Large Container Ships
WANG Jian, HUANG Xiaoping, (U Weicheng
School of Naval Architecture, Ocean and Civil Engineering, ShanghaiJiao Tong University
Shanghai 200240, Ch
Abstract Fatigue is one of the main damage modes of ships and ocean engineering structures. The appli-
tation of high tensile steel makes the fatigue problem in ship hulls cven more severe. For large container
ships whose decks are constructed with thick high tensile steel plates, it is essential to study the safety life
assessment of those parts with welding defects. In this paper, the fatigue loading spectrum is generated
from a long term distribution which obeys the two-parameter Weibull distribution, and the unique crack
growth rate model is adopted to predict the crack size at a certain given time. By combining the predicted
crack size. the
sity ta
d th
gram (FAD) a procedure to estimate the safety life of a cracked thick high tensile steel plate is presented
corresponding problem
tigated via a caleulation pro
nfluences of the fatigue loading spectrum on damage tolerance and fatigue life are analyzed. Results indi
ate that both the length of the fatigue load repetition period as well as the shape parameter of Weibull di
tribution greatly affect the fatigue safely life
Key words: container ship; thick high tensile steel plate; fatigue lord; crack propagation; safety life
failure assessment
之ー。大型集装箱船具有大开口、方型系数小、剖
面变化显著以及高航速等特点,为减轻船体自重,
疲劳是船舶与海洋工程结构破坏的主要模式上甲板等结构构件大量米用高强度厚钢板。一般
收稿日期:2013-09-03
网络出版时间:2014-01-2115:03
作者简介:王健(1989-),男,硕生。研究方向:高强度厚钢板的裂纹扩展分析及断裂评定。E-mail: drinkwater@situ.edu.en
黄小平(1963-),男,博士,副教授。研究方向:承压結构和船舶结构的强度、表穷断裂研究。
E-mail:xphuang@3;tu,edu.cn
崔维成(1963-),男,博士,教授。研究方向:船鉑极限承载能力计算新方法研究,船舶疲芳寿命预报的统一方法
研究,大型海洋浮体的流固耦合分析方法研究
通信作者:黄小平
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