A Study of Dynamic Buckling and Out-of-Round Effects of the Imperfect Cylinder Subjected to Bubble Pulse Loading Induced by Underwater Explosion

• Main Authors: Chang,Chia Wei, 張家瑋
• Other Authors: Liang,Cho Chung
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/92101175052066557032

碩士 === 大葉大學 === 機械與自動化工程學系 === 102 === A circular cylinder sections for the best compression, but by the manufacturing technology, processes and other restrictions, practically impossible for the perfect circular cross section, and for the loss of the circular cylindrical configuration; or submarines underwater works, or a high-speed crash suffered torpedo attack reef cause its external and internal component damage, then cylindrical will be formed due to the impact of different types of out-of-round, thus making a cylindrical pressure vessel of the lower its pressure effectiveness jeopardizing submarine's normal operations and the safety of personnel. In this thesis, cylinder as an object, using the ABAQUS finite element software as a tool to be hydrostatically validation, verification and Eulerian analytical methods validation, respectively cylindrical pressure hull dynamic buckling analysis and defect cylinder withstand the pressure hull underwater explosion bubble pulses structural response analysis, this paper examines the out-of-round types are:Meridional Imperfection, Latitudinal Imperfection, Local Imperfection and Whole Imperfection The results showed, Whole Imperfection overall resistance to buckling out-of-round ability is the worst; according to the structural response of the vom-Mises stress and deformation, Latitudinal Imperfection is the worst; purpose of this dissertation provides a cylindrical shell on the basis of the strength of the construction.