作者：陈金梅1, 金誉辉2, 金长义1
作者单位：1. 广西工业职业技术学院, 广西南宁 530003;
2. 广西特种设备监督检验院, 广西南宁 530022
关键词：换热器; 有限元法; 蒙特卡罗法; 可靠度; 灵敏度
摘要：
为了及时、准确地对在役换热器设备进行可靠性评估,将有限元和蒙特卡罗相结合方法引入对换热器模型的计算中。以概率论为基础,采用此方法对建立的换热器模型进行8000次随机抽样分析,求出在一定置信度下的可靠度曲线;并对输出随机变量的灵敏度和抽样过程进行了分析,求得对结果影响最大的因素是屈服强度。结果表明,该模型可以有效地反映换热器的实际情况,为其结构可靠性分析提供参考。
Analysis of heat exchanger structure reliability based on finite element method
CHEN Jin-mei1, JIN Yu-hui2, JIN Chang-yi1
1. Guangxi Industry Vocationl and Technical College, Nanning 530003, China;
2. Guangxi Institute of Special Equipment Supervision and Inspection, Nanning 530022, China
Abstract: For prompt and accurate reliability evaluation of heat exchanger in service, the Monte-Carlo and finite element method were applied in the calculation of heat exchanger model. The reliability curve under given credit degree was gained through 8000 samples on build heat exchanger model by monte-carlo and finite element method. The subdued intensity was the most influencing factors to the result by analyzing sensitivity and sample process on deferent random variables. The heat exchanger's practical circs were effectively reflected by the model, and referenced notions were given on structure reliability.
Keywords: Heat exchanger; Finite element method; Monte-carlo method; Reliability; Sensitivity
2008, 34(2): 131-133 收稿日期: 2007-8-23;收到修改稿日期: 2007-11-9
基金项目:
作者简介: 陈金梅(1978-),女,天津市人,硕士,助教,主要从事教学工作。
参考文献
[1] 赵宇, 张红. 模糊综合评判在热管换热器可靠性评估中的应用[J].技术产品版, 2006(3):13-25.
[2] 凌祥, 周帼彦, 邹群彩, 等.板翅式换热器新技术及应用[J].石油化工设备, 2002, 31(2):1-4.
[3] 公维生, 王锦勇.预应力列管换热器机器制造技术[J].化工施工技术, 1999, 21(2):24-25.
[4] 刘彤, 刘敏珊, 董其伍.换热器可靠性三维热-力耦合概率有限元模拟[J].热能动力工程, 2007, 22(2):197-200.
[5] 徐建民, 王晓清, 汪家琼, 等.波节管换热器管板应力分析[J].石油化工设计, 2006, 24(1):28-30.
[6] 张卫义, 田海晏.换热器膨胀节有限元分析的有效单元剖分方法[J].石油化工设备, 2006, 35(4):43-45.
[7] 孙德新, 游敏, 陈凤霞.基于有限元法的单搭接接头可靠性设计[J].研究报告及专论, 2006, 27(5):10-12.
[8] 刘海亮, 于洪杰, 徐鸿, 等.采用实体模型的厚管板的有限元分析[J].石油化工设备技术, 2005, 26(3):1-5.
[9] 余伟炜, 高炳军.ANSYS在机械与化工装备中的应用[M]. 北京:中国水利水电出版社, 2006.
[10] Dai Shu-Ho. Failure analysis and life prediction of a set of extra high pressure heat exchangers containing defects[J].International journal of pressure vessel and piping, 1997(70):197-200.
[11] 毕忠伟, 丁德馨.地下工程可靠性分析方法与进展[J].地下空间, 2004, 24(4):522-525.
[12] 孙奉仲.换热器的可靠性与故障分析导论[M].北京:中国标准出版社, 1998.
[13] WANG Min-ting, ZANG Xin-liang, LI Xue-tong, et al. Finite element simulation of hot strip continuous rolling process coupling microstructural evolution[J]. Journal of Iron and Steel Research, International, 2007, 14(3):30-36.
