지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
이용수
초록· 키워드
오류제보하기
Identification of the whipping response out of the combined wave-vibration response of a flexible sea going vessel is one of the most interesting research topic from ship designer’s point of view. In order to achieve this goal, a novel methodology based on the wavelet cross-correlation technique was proposed in this paper. The cross-correlation of the wavelet power spectrum averaged across the frequency axis was introduced to check the similarity between the combined wave-vibration response and impulse response. The calculated cross-correlation of the wavelet power spectrum was normalized by the auto-correlation of the each spectrum with zero time lag, eventually providing the cross-correlation coefficient that stays between 0 and 1, precisely indicating the existence of the impulse response buried in the combined wave-vibration response. Additionally, the weight function was introduced while calculating the cross-correlation of the two spectrums in order to filter out the signal of lower frequency so that the accuracy of the similarity check becomes as high as possible. The validity of the proposed methodology was checked through the application to the artificially generated ideal combined wave-vibration signal, together with the more realistic signal obtained by running 3D hydroelasticity program WISH-Flex. The correspondence of the identified whipping instances between the results, one from the proposed method and the other from the calculated slamming modal force, was excellent.
목차
1. 서론
2. 이론적 배경
3. 휘핑 응답 식별
4. 결론
References
참고문헌 (15)
참고문헌 신청
Amin, W / 2012 / Analysis of Wave Slam Induced Hull Vibrations using Continuous Wavelet Transforms / Ocean Engineering 58(15):154~166
Du, S.X / 2008 / Wavelet Analysis of Loads on a Flexible Ship Model Traveling in Large-Amplitude Waves / Journal of Ship Research 52(4):249~262
Ermanyuk, E.V. / 2005 / Impact of a Disc on Shallow Water / Journal of Fluids and Structures 20:345~357
Kim, J.H. / 2012 / Ship Springing Analysis for a Very Large Containership / International Journal of Offshore and Polar Engineering 22(3):217~224
Kim, J.H. / 2013 / Study on ship structural hydroelasticity and fatigue assessment in irregular seaways / Proceedings of ASME 32nd International Conference on Ocean
Du, S.X / 2008 / Wavelet Analysis of Loads on a Flexible Ship Model Traveling in Large-Amplitude Waves / Journal of Ship Research 52(4):249~262
Ermanyuk, E.V. / 2005 / Impact of a Disc on Shallow Water / Journal of Fluids and Structures 20:345~357
Kim, J.H. / 2012 / Ship Springing Analysis for a Very Large Containership / International Journal of Offshore and Polar Engineering 22(3):217~224
Kim, J.H. / 2013 / Study on ship structural hydroelasticity and fatigue assessment in irregular seaways / Proceedings of ASME 32nd International Conference on Ocean
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UCI(KEPA) : I410-ECN-0101-2015-550-001319775