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http://dx.doi.org/10.5139/JKSAS.2007.35.11.983

Fuzzy Uncertainty Analysis of the Bird Strike Simulation  

Lee, Bok-Won (한국과학기술원 항공우주공학과)
Park, Mi-Young (한국화이바(주))
Kim, Chun-Gon (한국과학기술원 항공우주공학과)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.35, no.11, 2007 , pp. 983-989 More about this Journal
Abstract
The bird strike simulation is a problem characterized by a high degree of uncertainty. It deals with nonlinear dynamics, complicated models of bird materials and geometry, as well as a plenty of possible boundary and initial conditions. In this complex field, uncertainty management plays an important role. This paper aims to assess the effect of input uncertainty of bird strike analysis on the impact behavior of the leading edge of the WIG(Wing in Ground Effect) craft obtained with finite element analysis using LS-DYNA 3D. The uncertainties of the bird strike simulation arise due to imprecision or lack of information, due to variability or scatter, or as a consequence of model simplification. These uncertain parameters are represented by fuzzy numbers with their membership functions quantifying an initial guess for the actual value of the model parameter. Using the transformation method as a special implementation of fuzzy arithmetic, the model can be analyzed with the intention of determining the influence of each uncertain parameter on the overall bird strike behavior.
Keywords
Bird strike; Fuzzy theory; Uncertainty; WIG Transformation method;
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