Abstract
Reanalysis is an efficient method to reduce the computational costs. For the nonlinear FEM, reanalysis based on single convergent solutions is still developing. A new reanalysis method, a multi-sample compression algorithm for elastoplastic FEM, is presented. This method consists of two strategies. First, based on the solved-sample, the approximate displacement of a solving-sample could be estimated by the method of displacement predicted, and serve as the initial value for the iterative computation. Second, the iterative stiffness of the solved-sample is applied in the solution of the solving-sample, which avoids the time-consuming decomposition of the stiffness. Examples of the thick-walled cylinder subjected to inner pressure are illustrated here. The results show that the new method is applicable when variables vary greatly, and significantly reduces the computational costs. This method is useful to obtain the convergent solutions for the elastoplastic nonlinear FEM for multi-sample conditions.
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References
Chen SH, Rong F (2002) A new method of structural modal reanalysis for topological modifications. Finite Elem Anal Des 38: 1015–1028
Huang H, Chen SH, Meng G (2005) Perturbation-pade method for static topological reanalysis. Acta Mech Solida Sin 26: 321–324
Hurtado JE (2002) Reanalysis of linear and nonlinear structures using iterated Shanks transformation. Comput Methods Appl Mech Eng 191: 4215–4229
Akgun MA, Garcelon JH, Haftka RT (2001) Fast exact linear and non-linear structural reanalysis and the Sherman-Morrison-Woodbury formulas. Int J Numer Method Eng 50: 1587–1606
Terdalkar SS, Rencis JJ (2006) Graphically driven interactive finite element stress reanalysis for machine elements in the early design stage. Finite Elem Anal Des 42: 884–899
Kirsch U (2003) A unified reanalysis approach for structural analysis, design, and optimization. Struct Multidiscip Optim 25: 67–85
Kirsch U, Bogomolni M, Sheinman I (2006) Nonlinear dynamic reanalysis of structures by combined approximations. Comput Methods Appl Mech Eng 195: 4420–4432
Kashiwagi M (2009) A numerical method foreign solution of locally modified systems based on the inverse power method. Finite Elem Anal Des 45: 113–120
Yamazak F, Shinozuka M, Dasgupta G (1988) Neumann expansion for stochastic finite element analysis. J Eng Mech 11: 1335–1353
Yang J, Chen Q (2002) A Monte-Carlo stochastic FEM based on conjugate gradients method. J Southwest Jiaotong University 37: 647–650 (in Chinese)
Yang J, Chen Q (2005) An extended form of Neumann stochastic finite element method. Chin J Comput Mech 22: 681–684 (in Chinese)
Yang J, Chen Q, Ma S (2008) Application of Chebyshev speed algorithm in single-sample finite element method under multi-sample conditions. Acta Mech Solida Sin 29: 408–411 (in Chinese)
Li ZG, Wu BS (2003) A new algorithm for modification of structural stiffness. J Jilin University 41: 36–39 (in Chinese)
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Yang, J., Xu, J. & Chen, Q. A new method of reanalysis: multi-sample compression algorithm for the elastoplastic FEM. Comput Mech 46, 783–789 (2010). https://doi.org/10.1007/s00466-010-0517-x
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DOI: https://doi.org/10.1007/s00466-010-0517-x