해석모델링 방법에 따른 선체거더의 수중폭발 휘핑응답 비교

• Published in: 大韓造船學會 論文集 Vol. 42; no. 6; pp. 631 - 636
• Main Authors: 권정일(Jeong-II Kwon), 정정훈(Jung-Hoon Chung), 이상갑(Sang-Gab Lee)
• Format: Journal Article
• Language: Korean
• Published: 대한조선학회 2005
• Subjects: 조선공학
• ISSN: 1225-1143; 2287-7355

One and three dimensional whipping response analyses of a naval surface combatant subjected to an underwater explosion bubble pulse were carried out to compare the efficiency and accuracy according to the modeling methods. In 1-D analysis, program UNDEXWHIP developed by KIMM was used, which is based on the thin-walled Timoshenko's beam theory and on the modal analysis method using wetted vibratory modes of the hull girder. In 3-D analysis, three finite element models were suggested using LS-DYNA/USA code, such as 3-D beam model considering geometric shape of wetted side shell, coarse and fine 3-D F.E. models. Through the comparison of results from the 1-D and 3-D analyses, it could be confirmed that 1-D analysis result is in good agreement with 3-D analysis ones, and that fine 3-D F.E. model, shock analysis one, is also used both in the shock response and whipping response analyses for the analyst effort and time savings.