›› 2007, Vol. 28 ›› Issue (4): 827-830.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Extended Davidon-Fletcher-Powell(DFP) optimization method and its application to displacement back analysis

LÜ Ying-hui，WANG Shui-lin，LI Chun-Guang，GE Xiu-run   

  1. 1. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2006-03-15 Online:2007-04-10 Published:2013-09-05

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Abstract: An extended DFP method, in which the modified Newton decent method is used to obtain good variables and Richard extrapolation is used to compute the gradient in each iteration. The single variable search, which the ordinary DFP arithmetic often has to do, is not required in the extended DFP method; but the optimized results can be reached step by step. Numerical test is carried out by both the extended DFP method and the ordinary DFP method; and comparisons of the results demonstrate that the extended DFP method is better than the ordinary DFP method in numerical stability, convergence and reliability.

Key words: extended-DFP method, Newton decent method, back-analysis, single variable search.

CLC Number: 

  • TB 115
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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