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Inverse Analysis of Dynamic Parameters of Rock Materials Based on Adaptive Hybrid Genetic Algorithms(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2008年第03期
Page:
286-291
Research Field:
水资源与地质工程
Publishing date:

Info

Title:
Inverse Analysis of Dynamic Parameters of Rock Materials Based on Adaptive Hybrid Genetic Algorithms
Author(s):
ZHAI Yue1; 2; ZHAO Jun-hai2
1. School o f Geological Engineering and Surveying, Changan University, Xian 710054, Shaanxi, China; 2. School o f Civil Engineering, Changan University, Xian 710061, Shaanxi, China;)
Keywords:
adaptive hybrid genetic algorithms;  rock materials;  nonlinear dynamic constitutive model;  characteristic parameters
PACS:
TU452
DOI:
-
Abstract:
The hybrid genetic algorithms is composed with the down hill optimization methods embedded in basic genetic algorithms by coding in real number, so capabilities of the local search are enhanced. The crossover probability and mutation probability of the genetic algorithms can be adjusted with the change of fitness functions of individuals. Furthermore, the local search probability is changed with the progress of generations. Characteristic parameters of the nonlinear dynamic constitutive model of granite and concrete are ascertained by the inverse analysis method based on the adaptive hybrid genetic algorithms. The results indicate that the calculated stress-strain curve matches with the experiment curve, and the approach presented here satisfactorily accounts for the features of dynamics of rock and other brittle materials.

References:

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Last Update: 2008-09-20