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[1]魏化中,何亚莹,游锋,等.大型储罐大角焊缝裂纹的可靠性分析[J].武汉工程大学学报,2014,(02):68-72.[doi:103969/jissn16742869201402013]
　WEI Hua zhong,HE Ya ying,YOU Feng,et al.Reliability analysis of large filletweld crack of largescale storage tank[J].Journal of Wuhan Institute of Technology,2014,(02):68-72.[doi:103969/jissn16742869201402013]
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大型储罐大角焊缝裂纹的可靠性分析(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
期数:
2014年02期
页码:
68-72
栏目:
机电与信息工程
出版日期:
2014-02-28

文章信息/Info

Title:
Reliability analysis of large filletweld crack of largescale storage tank
文章编号:
16742869(2014)02006805
作者:
魏化中; 何亚莹; 游锋; 张占武
武汉工程大学机电工程学院，湖北 武汉 430205
Author(s):
WEI Huazhong; HE Yaying; YOU Feng; ZHANG Zhanwu
School of Mechanical Engineering,Wuhan Institute of Technology,Wuhan 430205,China
关键词:
大型储罐; 可靠性分析; 有限元分析; 蒙特卡罗法; 应力强度因子
Keywords:
largescale storage tank; reliability analysis; finite element analysis; MonteCarlo method; stress intensity factor
分类号:
TE821
DOI:
103969/jissn16742869201402013
文献标志码:
A
摘要:
以100 000立方米浮顶式大型储罐为例，采用基于应力强度干涉模型的一次二阶矩法和基于ANSYS含裂纹平板的可靠性分析方法对大型储罐角焊缝裂纹进行了可靠性分析.首先基于应力强度干涉模型，根据应力强度因子断裂判据，采用一次二阶矩法计算储罐角焊缝裂纹动态扩展的可靠度，计算得到的应力强度因子为354.4 MPa·mm，可靠度为93.32%.然后运用ANSYS软件计算含裂纹平板的可靠度，先是采用1/4节点奇异单元法，计算出裂纹尖端应力强度因子为376.46 MPa·mm，再通过蒙特卡罗法来计算裂纹扩展的可靠性，得到可靠度为82.36%.通过比较两种方法得到的结果，采用ANSYS有限元分析所得的可靠度低于基于应力强度干涉理论计算得到的可靠度.从安全性角度出发，应选择可靠度低的分析结果来提供决策支撑.
Abstract:
Taking the large storage tank of 100,000 cubic meters with floating roof as a case,the first order second moment (FOSM) method on the model of stressstrength interference and the reliability analysis method of the crack plate on ANSYS were respectively used to analyze the reliability of the large filletweld crack of the largescale storage tank.First,using the fracture criterion of the stress intensity factor based on the model of stressstrength interference,the reliability degree of dynamic growth of the large filletweld crack of the largescale tank was calculated through the FOSM method.In this way,the values of the stress intensity factor and the reliability degree are 354.4 MPa·mm and 93.32%.Then,ANSYS software was used to calculate the reliability degree of the crack plate.The value of the stress intensity factor of the crack tip is 376.46 MPa·mm using 1/4point displacement method.The MonteCarlo method is used to calculate the reliability of crack growth,and the value of the reliability degree is 82.36%.Bying comparing the results from the two methods,the value of the reliability by ANSYS analysis is lower than that by the stressstrength interference theory.As far as safety is concerned,the result of lower reliability degree should be selected as decision support.

参考文献/References:

［1］SAWYER J P,RAO S S.Strengthbased reliability and fracture assessment of fuzzy mechanical and structural system［J］.AIAA Journal,1999,37(1):8492.［2］林国庆,王茂廷,时黛.基于ANSYS中MonteCarlo法对带局部夹套卧式容器的可靠性分析［J］.轻工机械,2012，30(1):99102.LIN Guoqing,WANG Maoting,SHI Dai.Reliability analysis of horizontal container with local jacket based on MonteCarlo method in ANSYS software［J］.Light Industry Machinery,2012，30(1):99102.（in Chinese）［3］陆毅中.工程断裂力学［M］.西安:西安交通大学出版社,1986:3339.［4］WANG Yanxia，LIU Yongqi，SHI Haiyan.The reliability analysis for pistons on fracture mechanics［C］//Proceedings of ICCMS 2010 International Conference on Computer Modeling and Simulation,2224 January 2010,Sanya,China.Los Alamitos,CA:the IEEE Computer Society ,2010，4： 173177.［5］杨益清,董金善,徐新军，等.运用ANSYS的含裂纹平板试件的可靠性分析方法研究［J］.现代制造工程,2010(12):5457.YANG Yiqing,DONG Jinshan,XU Xinjun,et al.The method research of reliable analysis for the plate specimen containing the crack based on ANSYS［J］.Modern Manufacturing Engineering,2010(12):5457.（in Chinese）

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备注/Memo

备注/Memo:
收稿日期：20130510基金项目：“十二五”国家科技支撑计划课题《特种设备结构健康监测与损伤诊断技术》的子专题《大型储罐基于风险的评估技术研究》(NO.2011BAK06B0113)作者简介：魏化中（1955），男，湖南永州人，教授.研究方向：压力容器、压力管道、流体机械和搅拌设备的开发、新型高效过程装备及仿真技术.
更新日期/Last Update: 2014-03-20