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	Self-adaptive one-dimensional nonlinear finite element method based on element energy projection method
	Yuan S(袁驷) ; Du Y(杜炎) ; Xing QY(邢沁妍) ; Ye KS(叶康生) ; Si YUAN ; Yan DU ; Qin-yan XING ; Kang-sheng YE
	2016-03-30 ; 2016-03-30
关键词	nonlinearity finite element method(FEM) self-adaptive analysis superconvergence element energy projection(EEP) ordinary differential equation(ODE) O241.82
其他题名	Self-adaptive one-dimensional nonlinear finite element method based on element energy projection method
中文摘要	The element energy projection(EEP) method for computation of superconvergent resulting in a one-dimensional finite element method(FEM) is successfully used to self-adaptive FEM analysis of various linear problems, based on which this paper presents a substantial extension of the whole set of technology to nonlinear problems.The main idea behind the technology transfer from linear analysis to nonlinear analysis is to use Newton's method to linearize nonlinear problems into a series of linear problems so that the EEP formulation and the corresponding adaptive strategy can be directly used without the need for specific super-convergence formulation for nonlinear FEM. As a result, a unified and general self-adaptive algorithm for nonlinear FEM analysis is formed.The proposed algorithm is found to be able to produce satisfactory finite element results with accuracy satisfying the user-preset error tolerances by maximum norm anywhere on the mesh. Taking the nonlinear ordinary differential equation(ODE) of second-order as the model problem, this paper describes the related fundamental idea, the implementation strategy, and the computational algorithm. Representative numerical examples are given to show the efficiency, stability, versatility, and reliability of the proposed approach.; The element energy projection(EEP) method for computation of superconvergent resulting in a one-dimensional finite element method(FEM) is successfully used to self-adaptive FEM analysis of various linear problems, based on which this paper presents a substantial extension of the whole set of technology to nonlinear problems.The main idea behind the technology transfer from linear analysis to nonlinear analysis is to use Newton's method to linearize nonlinear problems into a series of linear problems so that the EEP formulation and the corresponding adaptive strategy can be directly used without the need for specific super-convergence formulation for nonlinear FEM. As a result, a unified and general self-adaptive algorithm for nonlinear FEM analysis is formed.The proposed algorithm is found to be able to produce satisfactory finite element results with accuracy satisfying the user-preset error tolerances by maximum norm anywhere on the mesh. Taking the nonlinear ordinary differential equation(ODE) of second-order as the model problem, this paper describes the related fundamental idea, the implementation strategy, and the computational algorithm. Representative numerical examples are given to show the efficiency, stability, versatility, and reliability of the proposed approach.
语种	英语 ; 英语
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/149004]
专题	清华大学
推荐引用方式 GB/T 7714	Yuan S,Du Y,Xing QY,et al. Self-adaptive one-dimensional nonlinear finite element method based on element energy projection method[J],2016, 2016.
APA	袁驷.,杜炎.,邢沁妍.,叶康生.,Si YUAN.,...&Kang-sheng YE.(2016).Self-adaptive one-dimensional nonlinear finite element method based on element energy projection method..
MLA	袁驷,et al."Self-adaptive one-dimensional nonlinear finite element method based on element energy projection method".(2016).

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