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A Novel Method for Analyzing Circumferential Stiffened Non-Circular Cylindrical for Shell

Author: XiaoChengChu
Tutor: ChenJianQiao；XiangYu
School: Huazhong University of Science and Technology
Course: Solid Mechanics
Keywords: Ring stiffened cylindrical shell Homogenized High Precise Integration Semi - analytical and semi - numerical method Strength calculation
CLC: O302
Type: Master's thesis
Year: 2007
Downloads: 41
Quote: 0
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Abstract


The degree thesis the horizontal collaborative project funded by China Shipbuilding Industry Corporation , enhance the strength of the non- cylindrical shell ring-stiffened system , in-depth research , focusing on the modeling , solving methods , and basic mechanical properties of the above . Strive to use modern mathematical tools propose a semi-numerical strength analysis of complex structures such as the semi-analytical solution , in order to provide powerful means for their analysis and design . The main innovation of this paper work : ( 1 ) First, consider the interaction between non - cylindrical shell and ring rib , and the use of the interface corresponding displacement coordinating relations with the Dirac-δ function to export a series of related analytical type , including shell plates and ribs first-order matrix ordinary differential equations, the equation Homogeneitisation coefficient constant , as well as units at both ends of the transfer matrix . (2 ) based on the homogeneous expansion precise integration method and Fourier series , the idea of using circumferential state vector Piecewise passed to strengthen the non - cylindrical shells under external pressure on both ends of the ring-stiffened simply supported , proposed a new semi-analytical solution method , and computer implementation . (3) single cylindrical shell , for example , the calculated results and the known analytical solutions were compared ; calculated the end bulkhead closed under elliptic cylindrical shell and ring stiffened elliptic cylindrical shell in water pressure stress and deformation, and were compared with the calculation of the finite element commercial software . The results show that the proposed new method not only high precision , there is an obvious superiority .

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