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논문 기본 정보

자료유형
학술저널
저자정보
김호성 (인하대학교) 안인규 (인하대학교) 김유일 (인하대학교)
저널정보
대한조선학회 대한조선학회 논문집 대한조선학회논문집 제52권 제1호
발행연도
2015.2
수록면
88 - 95 (8page)

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이 논문의 연구 히스토리 (2)

초록· 키워드

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For the frequency-domain spectral fatigue analysis, the probability density function of stress range needs to be estimated based on the stress spectrum only, which is a frequency domain representation of the response. The probability distribution of the stress range of the narrow-band spectrum is known to follow the Rayleigh distribution, however the PDF of wide-band spectrum is difficult to define with clarity due to the complicated fluctuation pattern of spectrum. In this paper, efforts have been made to figure out the links between the probability density function of stress range to the structural response of wide-band Gaussian random process. An artificial neural network scheme, known as one of the most powerful system identification methods, was used to identify the multivariate functional relationship between the idealized wide-band spectrums and resulting probability density functions. To achieve this, the spectrums were idealized as a superposition of two triangles with arbitrary location, height and width, targeting to comprise wide-band spectrum, and the probability density functions were represented by the linear combination of equally spaced Gaussian basis functions. To train the network under supervision, varieties of different wide-band spectrums were assumed and the converged probability density function of the stress range was derived using the rainflow counting method and all these data sets were fed into the three layer perceptron model. This nonlinear least square problem was solved using Levenberg-Marquardt algorithm with regularization term included. It was proven that the network trained using the given data set could reproduce the probability density function of arbitrary wide-band spectrum of two triangles with great success.

목차

1. 서론
2. 응력 스펙트럼
3. 확률밀도 함수의 근사
4. 인공 신경망
5. 비교 및 검증
6. 결론
References

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UCI(KEPA) : I410-ECN-0101-2016-559-001073791