低温条件下铝制翅片-隔板-封条钎焊结构的应力特性的数值模拟

兰州理工大学学报 ›› 2022, Vol. 48 ›› Issue (5): 70-78.

低温条件下铝制翅片-隔板-封条钎焊结构的应力特性的数值模拟

麻宏强^*1,2, 贾继伟^1,2, 厚彩琴¹, 王刚¹

1.兰州理工大学土木工程学院, 甘肃兰州 730050;
2.华东交通大学土木建筑学院, 江西南昌 330000

收稿日期:2021-07-22 出版日期:2022-10-28 发布日期:2022-11-21
通讯作者: 麻宏强(1984-),男,甘肃静宁人,博士,副教授. Email:mhq2014@sina.com
基金资助:
国家自然科学基金(51808275),甘肃省自然科学基金(1606RJZA059),中国博士后基金(2018M643768),“十三五”重大科技攻关项目“高含硫气藏安全高效开发技术”(2016zx05017-004),中国石化“十条龙”集团公司专项(P18062-6)

Numerical simulation of stress characteristics of aluminum fin-plate-side bar brazing structure under low temperature

MA Hong-qiang^1,2, JIA Ji-wei^1,2, HOU Cai-qin¹, WANG Gang¹

1. School of Civil Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China;
2. School of Civil Engineering and Architecture, East China Jiaotong University,Nanchang 330000, China

Received:2021-07-22 Online:2022-10-28 Published:2022-11-21

摘要/Abstract

摘要： 基于热-弹性理论,建立了铝制翅片-隔板-封条钎焊结构的热结构应力分析模型.采用热-结构耦合的方法,模拟分析了铝制翅片-隔板-封条钎焊结构的应力分布.结果表明,等效热应力、等效结构应力和等效应力均在钎焊结构的钎焊接头处产生应力集中,这主要是由于钎焊接头处母材和钎焊层材料性能的不完全匹配和钎焊接头处的结构具有不连续性造成的.等效热应力、等效结构应力和等效应力沿典型路径在钎焊接头处的分布主要受正应力的影响.在热-结构耦合作用下,等效应力主要受等效热应力的影响.因此,热边界的选取对模拟结果的影响是非常重要的.

关键词: 热应力, 结构应力, 等效应力, 热-结构耦合, 有限元法

Abstract: Based on the thermal-elastic theory, a thermal and structure stress analysis model of aluminum brazing structure with fin-plate-side bar is established. The coupling method of thermal-structure was used to simulate and analyze the stress distribution of aluminumbrazing structure with fin-plate-side. The results show that the stress concentration of equivalent thermal stress, equivalent structure stress and equivalent stress is generated at the brazed joint of brazing structure, which is mainly caused by the incomplete matching of the material properties of the base metal and the brazed layer at the brazed joint and the discontinuity of the structure at the brazed joint. The distribution of equivalent thermal stress, equivalent structure stress and equivalent stress along typical path are mainly affected by normal stresses. Under the coupling effect of thermal and structure, the equivalent thermal stress has a significant influence on the equivalent stress. Therefore, the selection of thermal boundary is crucial to the simulation results.

Key words: thermal stress, structure stress, equivalent stress, coupling of thermal-structure, finite element method

中图分类号:

TE64

麻宏强, 贾继伟, 厚彩琴, 王刚. 低温条件下铝制翅片-隔板-封条钎焊结构的应力特性的数值模拟[J]. 兰州理工大学学报, 2022, 48(5): 70-78.

MA Hong-qiang, JIA Ji-wei, HOU Cai-qin, WANG Gang. Numerical simulation of stress characteristics of aluminum fin-plate-side bar brazing structure under low temperature[J]. Journal of Lanzhou University of Technology, 2022, 48(5): 70-78.

参考文献

[1] MA H Q,HOU C Q,YANG R X,et al.The influence of structure parameters on stress of plate-fin structures in LNG heat exchanger [J].Journal of Natural Gas Science and Engineering,2016,34:85-99.
[2] MA H Q,CHEN J,CAI W H,et al.The influence of operation parameters on stress of plate-fin structures in LNG heat exchanger [J].Journal of Natural Gas Science and Engineering,2015,26:216-228.
[3] 葛磊.板翅式换热器等效均匀化强度设计 [D].青岛:中国石油大学(华东),2018.
[4] 刘阳.316L不锈钢板翅结构等效蠕变速率和寿命研究 [D].青岛:中国石油大学(华东),2018.
[5] MA H Q,LIU Y M,HOU C Q,et al.Numerical investigation on the thermal-flow performance of humid air-water in the interspace outside staggered tube bundles [J].International Journal of Heat and Mass Transfer,2021,166:120784.
[6] MIZOKAMI Y,IGARI T,KAWASHIMA F,et al.Development of structural design procedure of plate-fin heat exchanger for HTGR [J].Nuclear Engineering and Design,2013,255:248-262.
[7] PATRICK H,PASCAI F,THOMAS A,et al.A transient three-dimensional model for thermo-fluid simulation of cryogenic plate-fin heat exchangers-science direct [J].Applied Thermal Engineering,2020,180:115791.
[8] 郝鸿伟,文键,赵欣,等.超流氦系统负压低温板翅式换热器新型波纹-锯齿翅片的性能研究 [J].西安交通大学学报,2021,55:1-7.
[9] 靳遵龙,李水云,董其伍,等.复合材料板翅式换热器力学与传热性能数值研究 [J].塑料工业,2012,40:42-44.
[10] 文键,王春龙,刘华清,等.板翅式换热器波纹翅片性能数值模拟及其优化 [J].高校化学工程学报,2020,34:65-71.
[11] 文键,李亚梅,王少华,等.板翅式换热器板翅结构强度影响因素分析 [J].低温工程,2013,2:52-59.
[12] MA H Q,CAI W H,ZHENG W K,et al.Stress characteristics of plate-fin structures in the cool-down process of LNG heat exchanger [J].Journal of Natural Gas Science and Engineering,2014,21:1113-1126.
[13] MA H Q,CAI W H,YAO Y,et al.Investigation on stress characteristics of plate-fin structures in the heat-up process of LNG heat exchanger [J].Journal of Natural Gas Science and Engineering,2016,30:256-267.