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랜덤 필드를 고려한 회전 블레이드 고유진동수의 불확실성 정량화 방법

Title
랜덤 필드를 고려한 회전 블레이드 고유진동수의 불확실성 정량화 방법
Other Titles
Uncertainty Quantification Method of Natural Frequencies of a Rotating Blade considering Random Fields
Author
유홍희
Keywords
Uncertainty quantification; 불확실성 정량화; Random field; Polynomial chaos expansion; Hermite polynomial
Issue Date
2015-04
Publisher
한국소음진동공학회
Citation
춘계학술대회 논문집, 2015.4, 320-322 (3 pages)
Abstract
The natural frequencies of a rotating blade are determined by the parameters such as material properties of the blade, area and area moment of inertia of a blade cross section and a rotating speed. The parameters always have uncertainties caused by manufacturing tolerances, material irregularities and uncertain operating conditions. Since the parameter uncertainties lead to the uncertainties of natural frequencies, reliability based design should be conducted through the uncertainty quantification of the system. For the uncertainties of the area and area moment of inertia, random fields should be considered since the uncertainties of the area and area moment of inertia are the function of spatial variables. Therefore, an uncertainty quantification method of natural frequencies considering the random fields needs to be developed. In this paper, an uncertainty quantification method of natural frequencies of a rotating blade considering random fields was proposed employing a stochastic spectral method using polynomial chaos expansion (PCE). Compared to the Monte-Carlo simulation results, the accuracy and effectiveness of the proposed method was validated.
URI
http://www.dbpia.co.kr/Article/NODE06297949http://hdl.handle.net/20.500.11754/24217
ISSN
1598-2548
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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