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Sensitivity Analysis of Ordinary Kriging Interpolation According to Different Variogram Models  

Woo, Kwang-Sung (영남대학교 건설환경공학부)
Park, Jin-Hwan (서울시청 도시기반시설본부 시설안전부)
Lee, Hui-Jeong (경상북도 영양군청 건설재난관리과)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.21, no.3, 2008 , pp. 295-304 More about this Journal
Abstract
This paper comprises two specific objectives. The first is to examine the applicability of Ordinary Kriging interpolation(OK) to finite element method that is based on variogram modeling in conjunction with different allowable limits of separation distance. The second is to investigate the accuracy according to theoretical variograms such as polynomial, Gauss, and spherical models. For this purpose, the weighted least square method is applied to obtain the estimated new stress field from the stress data at the Gauss points. The weight factor is determined by experimental and theoretical variograms for interpolation of stress data apart from the conventional interpolation methods that use an equal weight factor. The validity of the proposed approach has been tested by analyzing two numerical examples. It is noted that the numerical results by Gauss model using 25% allowable limit of separation distance show an excellent agreement with theoretical solutions in literature.
Keywords
ordinary kriging interpolation; variogram model; allowable limit of separation distance; Gauss model;
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Times Cited By KSCI : 1  (Citation Analysis)
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