全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
-  2016 

基于无单元伽辽金法的混凝土通水温度计算 Temperature computation for pipe cooling problems of concrete structures based on EFGM

Keywords: 无单元伽辽金法,大体积混凝土,通水冷却,热传导,轴对称问题

Full-Text   Cite this paper   Add to My Lib

Abstract:

利用无单元伽辽金法的高精度优势,探讨研究其在大体积混凝土智能通水及精准温控中的应用.首先将大体积混凝土通水冷却问题近似为轴对称热传导问题,使用二维背景网格来离散对称截面,提出了基于无单元伽辽金法的基本理论及数值计算过程;当不考虑沿程水温变化时,问题进一步简化为轴对称平面问题,并给出了相应的计算公式;对于典型二期通水冷却问题,建立了不同密度的背景网格模型并进行了计算分析,结果显示无单元伽辽金法在求解这种问题时具有良好收敛性,且采用相同节点时计算精度明显高于有限元法.进一步的工程应用则还需开展三维问题沿程水温模拟及无单元伽辽金法与有限元法的耦合等研究

References

[1]  Belytschko T,Lu Y Y,Gu L.Element-free Galerkin methods[J].International Journal for Numerical Methods in Engineering,1994,37(2):229-256.
[2]  Cheng Jing,Liu G R,Li Tongchun,Wu Shengchuan,Zhang Guiyong.ES-PIM with cell death and birth technique for simulating heat transfer in the concrete dam construction process[J].ASCE-Journal of Engineering Mechanics,2012,138(1):133-142.
[3]  程井,常晓林,周伟,等.应用无单元伽辽金法计算大坝稳定温度场[J].武汉大学学报(工学版),2008,41(4):48-51.Cheng Jing,Chang Xiaolin,Zhou Wei,et al.Application of element-free Galerkin method to computation of steady temperature field for dams[J].Engineering Journal of Wuhan University,2008,41(4):48-51.
[4]  Monaghan J J.Smoothed particle hydrodynamics[J].Annual Review of Astronomy and Astrophysics,1992,30:543-574.
[5]  Belytschko T,Krongauz Y,Dolbow J,Gerlach C.On the completeness of meshfree particle methods[J].International Journal for Numerical Methods in Engineering,1998,43(5):785-819.
[6]  Atluri S N,Zhu T.A new meshless local PetrovGalerkin(MLPG)approach in computational mechanics[J].Computational Mechanics,1998,22(2):117-127.
[7]  程井,常晓林,周伟,等.基于无单元伽辽金法的水工结构温度应力及温度裂纹扩展计算[J].四川大学学报(工程科学版),2009,(4):26-30.Cheng Jing,Chang Xiaolin,Zhou Wei,et al.Simulation of thermal stress and crack propagation in hydraulic structures based on EFGM[J].Journal of Sichuan University(Engineering Science Edition),2009,(4):26-30.
[8]  黄达海,陈彦玉,王祥峰,等.基于分布式光纤测温的特高拱坝温控预报研究[J].水利水电技术,2010,(9):42-46.Huang Dahai,Chen Yanyu,Wang Xiangfeng,et al.Study on prediction of temperature control of superhigh concrete arch dam with fiber-optic-based distributed temperature sensing[J].Water Resources and Hydropower Engineering,2010,(9):42-46.
[9]  孔祥谦.热应力有限单元法分析[M].上海:上海交通大学出版社,1999.Kong Xiangqian.Finite Element Analysis of Thermal Stress[M].Shanghai:Shanghai Jiaotong University Press,1999.
[10]  Cheng J,Zhu Y M,Chang X L.Application of element-free Galerkin method on the steady-state and transient temperature field simulation for high concrete dams[C]//3rd Asia-Pacific International Conference on Computational Methods in Engineering.Nanjing:ICOME 2009.
[11]  林鹏,李庆斌,周绍武,等.大体积混凝土通水冷却智能温度控制方法与系统[J].水利学报,2013,(8):950-957.Lin Peng,Li Qingbin,Zhou Shaowu,et al.Intelligent cooling control method and system for mass concrete[J].Journal of Hydraulic Engineering,2013,(8):950-957.
[12]  朱伯芳.大体积混凝土温度应力与温度控制[M].北京:中国电力出版社,2003.Zhu Bofang.Thermal Stresses and Temperature Control of Mass Concrete[M].Beijing:China Water&Power Press,2003.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133