基于正交试验法的高模量区E-B模型参数敏感性分析
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摘要
为研究高模量区E-B模型参数对超高镶嵌面板堆石坝有限元计算结果的影响,基于正交试验法,以超高镶嵌面板堆石坝高模量区模型参数为因素,进行各因素对坝体沉降u_3、面板挠度w及顺坡向应力σ的敏感性分析。结果表明,体积模量基数K_b、内摩擦角φ、体积模量指数m敏感性较高,对计算结果影响程度显著,而弹性模量基数K、弹性模量指数n等参数的敏感性较低,对计算结果影响程度不显著。因此,选取E-B模型计算参数时,可对敏感性高的参数进行反演以节约计算成本,而敏感性低的模型参数可采用工程类比等方法确定,以实现保证计算精度的前提下提高计算效率的目的。
The influence of E-B model parameters in high modulus zone on the finite element calculation results of ultrahigh inlaid concrete faced rockfill dam is investigated in the present study. Based on the orthogonal test,the model parameters of the high modulus zone of the ultra-high inlaid concrete faced rockfill dam are taken as the main reference variables and their sensitivity on the dam settlement u_3、panel deflection w and slope stress σ has been analyzed. The results show that the bulk modulus radix K_b,internal friction angle φ and the bulk modulus index m have higher sensitivity,indicating a higher impact on the calculation result. However,the elasticity modulus K and the elasticity modulus index n have lower sensitivity relatively and the calculation result is less influenced. Thus,parameters of E-B model with high sensitivity should be taken as the main target in the inversion analysis to save the computational cost,and other parameters can be determined via engineering analogy. As a result,the purpose of improving the calculation efficiency under the premise of accuracy can be achieved.
The influence of E-B model parameters in high modulus zone on the finite element calculation results of ultrahigh inlaid concrete faced rockfill dam is investigated in the present study. Based on the orthogonal test,the model parameters of the high modulus zone of the ultra-high inlaid concrete faced rockfill dam are taken as the main reference variables and their sensitivity on the dam settlement u_3、panel deflection w and slope stress σ has been analyzed. The results show that the bulk modulus radix K_b,internal friction angle φ and the bulk modulus index m have higher sensitivity,indicating a higher impact on the calculation result. However,the elasticity modulus K and the elasticity modulus index n have lower sensitivity relatively and the calculation result is less influenced. Thus,parameters of E-B model with high sensitivity should be taken as the main target in the inversion analysis to save the computational cost,and other parameters can be determined via engineering analogy. As a result,the purpose of improving the calculation efficiency under the premise of accuracy can be achieved.
引文
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[2]陆希,徐宏璐.镶嵌组合坝混凝土坝体结构体型探讨[J].西北水电,2014(6):30-33.(LU Xi,XU Honglu.Study on concrete dam structural outline of embedded composite dam[J].Northwest Water Power,2014(6):30-33.(in Chinese))
[3]李炎隆,张再望,卜鹏,等.镶嵌面板坝高模量区优化设计研究[J].应用力学学报,2018,35(2):358-364.(LIYanlong,ZHANG Zaiwang,BU Peng,et al.The optimization design of high modulus zone to inlaid concrete faced rockfill dam[J].Chinese Journal of Applied Mechanics,2018,35(2):358-364.(in Chinese))
[4]王玉赞,迟世春,邵磊,等.堆石料残余变形特性与参数敏感性分析[J].岩土力学,2013,34(3):856-862.(WANG Yuzan,CHI Shichun,SHAO Lei,et al.Residual deformation behavior of rock-fill materials and sensitivity analysis of parameters[J].Rock and Soil Mechanics,2013,34(3):856-862.(in Chinese))
[5]李炎隆,李守义,丁占峰,等.基于正交试验法的邓肯-张E-B模型参数敏感性分析研究[J].水利学报,2013,44(7):873-879.(LI Yanlong,LI Shouyi,DING Zhanfeng,et al.The sensitivity analysis of Duncan-Chang E-B model parameters based on the orthogonal test method[J].Journal of Hydraulic Engineering,2013,44(7):873-979.(in Chinese))
[6]陈辉,刘东海,戚蓝.改进的堆石坝变形计算参数敏感性分析方法[J].河海大学学报(自然科学版),2017,45(5):406-412.(CHEN Hui,LIU Donghai,QI Lan.Improved sensitivity analysis method for calculating the deformation parameters of the rock-fill dam[J].Journal of Hohai University(Natural Sciences),2017,45(5):406-412.(in Chinese))
[7]彭正光.西北口面板堆石坝蓄水7年变形分析[J].水利水电技术,1999,30(9):24-27.(PENG Zhenggaung.Analysis on deformation of northwest mouth concrete face rock-fill Dam for 7 years[J].Water Resources and Hydropower Engineering,1999,30(9):24-27.(in Chinese))
[8]LI Y L,LI S Y,YANG Y,et al.Temperature stress and surface insulation measures of concrete face slabs during cold wave period[J].International Journal of Civil Engineering,2015,13(4):501-507.
[9]王子健,刘斯宏,李玲君,等.公伯峡面板堆石坝面板裂缝成因数值分析[J].水利学报,2014,45(3):343-350.(WANG Zijian,LIU Sihong,LI Lingjun,et al.Numerical analysis of the causes of slab’s cracks on Gongboxia face rockfill dam[J].Journal of Hydraulic Engineering,2014,45(3):343-350.(in Chinese))
[10]周恒,翟迎春,张晓将,等.茨哈峡混凝土面板堆石坝技术可行性及大坝安全性初步研究[J].西北水电,2015(1):25-29.(ZHOU Heng,ZHAI Yingchun,ZHANGXiaojiang,et al.Study on technical feasibility and dam safety of CFRD,Cihaxia Hydropower Project[J].Northwest Water Power,2015(1):25-29.(in Chinese))
[11]陈生水,阎志坤,傅中志,等.特高面板砂砾石坝结构安全性论证[J].岩土工程学报,2017,39(11):1949-1958.(CHEN Shengshui,YAN Zhikun,FU Zhongzhi,et.al.Evaluation of safety performance of extremely high salbface gravel dams[J].Chinese Journal of Geotechnical Engineering,2017,39(11):1949-1958.(in Chinese))
[12]贾超,张凯,张强勇,等.基于正交试验设计的层状盐岩地下储库群多因素优化研究[J].岩土力学,2014,35(6):1718-1726.(JIA Chao,ZHANG Kai,ZHANGQiangyong,et al.Research on multi-factor optimization of underground laminated salt rock storage group based on orthogonal experimental design[J].Rock and Soil Mechanics,2014,35(6):1718-1726.(in Chinese))
[13]SHEN Q W,ZHENG Y,LI S,et al.Optimize process parameters of microwave-assisted EDTA method using orthogonal experiment for novel Ba Co O3-δperovskite[J].Journal of Alloys and Compounds,2016,658:125-131.
[14]GAO X S,ZHANG Y D,ZHANG H W,et al.Effects of machine tool configuration on its dynamics based on orthogonal experiment method[J].Chinese Journal of Aeronautics,2012,25(2):285-291.
[15]GUO S,ZHOU X,SONG S S,et al.Optimization of leaching conditions for removing sodium from sodium-rich coals by orthogonal experiments[J].Fuel,2017,208:499-507.
[16]王瑞骏,李阳,丁占峰.堆石料流变模型参数敏感性分析的正交试验法[J].水利学报,2016,47(2):245-252.(WANG Ruijun,LI Yang,DING Zhanfeng.The sensitivity analysis of seven-parameter rockfill rheological model based on the orthogonal test method[J].Journal of Hydraulic Engineering,2016,47(2):245-252.(in Chinese))
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