Coupled Fluid - Structure interaction problems -- A study of Strength Analysis on Submarine Pressure Hull

• Main Authors: Wen-Hao Lai, 賴文豪
• Other Authors: Cho-Chung Liang
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/59803565419639702230

博士 === 中正理工學院 === 國防科學研究所 === 86 === Submersible pressure hull is an important element of submarine structures which, from a structural perspective, can withstand a uniform external pressure. The structure may undergo transient dynamic loading in a complex operating site. Therefore, owing to its practical applications, results obtained from transient interaction of shock wave with submerged structure have received considerable interest. Based on the procedure which couples the Finite Element method with the integral representation for the pressure on shell surface derived from Kirchhoff’s retarded potential integral method, this work addresses the problem of transient responses of a submarine’s pressure hull subjected to expotential incident shock wave in sea water, in air and in vacuum, in which geometrical nonlinear and elastoplastic material behavior is considered. Numerical results indicate that the adopted procedure shows good agreement with related literature, which considered the linear elastic behavior of a shell. In static study, performance results reveals that the maximum von mises stress and radial displacement occur at the middle of compartments. In transient dynamic study, analysis results indicate that the structure responses considered fluid-structure interaction has time delay, response level and frequency drop.