BUCKLING ANALYSIS OF VARIABLE STIFFNESS CYLINDRICAL SHELL AND OPTIMIZATION OF LAYING PATH

Abstract

Abstract: In order to improve the buckling resistance of the cylindrical shell, two kinds of wire laying schemes were designed and the radial basis function metamodel was used to optimize the parameters in the two laying schemes. The calculation results of ABAQUS and ANSYS were compared to verify the reliability of ABAQUS modeling. The ABAQUS is used to analyze the buckling of the variable stiffness cylindrical shell under external pressure load, internal pressure load, combined load of external pressure and axial compression, combined load of internal pressure and axial compression. The radial basis function metamodel optimization algorithm is implemented by MATLAB to optimize the parameters of the wire laying scheme. The results show that compared with the laying method with linear variation of the laying angle, the non-linear variation of the laying angle is beneficial to improve the buckling resistance of the cylindrical shell under the combined load of the internal pressure and axial compression. For the cylindrical shell under the load of internal pressure and axial compression, the parameters m and n increased, which can improve the optimized buckling load. The buckling critical load and the laying path are approximate after optimization of the two wire laying schemes, and the accuracy of metamodel optimization is verified. It is feasible to optimize the parameters in the complex routing scheme by the radial basis function metamodel. The optimization results can provide a certain reference for the fiber-angled laying component.

Key words: variable stiffness cylindrical shell, wire laying scheme, radial basis function, metamodel, buckling load, metamodel

CLC Number:

TB332

WU Shuang-hua, YIN Guan-sheng, CHEN Tong, ZHANG Bo. BUCKLING ANALYSIS OF VARIABLE STIFFNESS CYLINDRICAL SHELL AND OPTIMIZATION OF LAYING PATH[J]. Composites Science and Engineering, 2020, 0(3): 37-43.

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