Hydroelastic analysis of floating structures subjected to underwater explosive bubbles = 수중 폭발을 고려한 부유식 구조물의 유탄성 해석

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The coupled model for the interaction between an underwater explosive bubble and a floating structure is studied. During the violent expansion and collapse of the bubble, the explosive bubble deforms the structure. At the same time, the response of the structure affects the behavior of the bubble. In this study, the fluid domain for the bubble is modeled by using the boundary element method and the structure domain is modeled by using the finite element method. Based on the acceleration potential theory, we can construct a single set of coupled equations considering both the behavior of the bubble and the response of the structure simultaneously. In this study, we apply the quadratic surface fitting for constructing the coupled equation to avoid complex computation and weighted least square to minimize the error. To validate our model, we compare the results with both the rigid wall case and the free surface case. Then, the numerical example of steel plate is compared with LS-DYNA. Additionally, the change of the behavior of the bubble according to the stiffness of the plate is studied.
Advisors
Lee, Phill-Seungresearcher이필승researcher
Description
한국과학기술원 :기계공학과,
Publisher
한국과학기술원
Issue Date
2019
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 기계공학과, 2019.2,[iv, 51 p. :]

Keywords

Boundary element method▼afinite element method▼afluid - structure interation▼abubble dynamics▼ahydroelastic analysis▼adirect coupled method▼afloating plate structures; 경계요소법▼a유한요소법▼a유체 - 구조체 상호작용▼a버블 다이나믹스▼a유탄성 해석▼a직접 연성해석법▼a부유식 구조물

URI
http://hdl.handle.net/10203/265932
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=843054&flag=dissertation
Appears in Collection
ME-Theses_Master(석사논문)
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