ANALYSIS OF POSTBUCKLING STRENGTH OF STRINGER STIPFENED CYLINDRICAL SHELLS UNDER AXIAL COMPRESSION

An analysis of the postbuckling strength of stringer stiffened cylindrical shells, subject to axial compres-sion is described. The method used in this paper is based on plastic analysis extending Murray's method which was used to analyse postbuckling behaviour of stiffened plates loaded axially and in bendin9. The mechanism tripping of stringer and crumpling of shell plate is described based on how the test specimens are deformed after buckling. Finally the theoretical analyses are compared with the experimental results of steel specimens. The theoretical results coincide quite well with the experimental data. It should therefore be possible to use the method described here to analyse postbuckling strength of stringer stiffened cylindrical shells and to estimate energy absorption capabilities in relation to collision studies.     

纵筋加强圆柱壳在轴压下失稳后强度分析

本文介绍了纵筋加强圆柱壳在轴压下失稳后的强度分析。本文用的是塑性分析法,它是Murray分析加筋板在轴压和弯曲下失稳后行为的一种推广。按失稳后试件变形描绘纵筋屈曲和壳板皱折的机构。 最后对理论分析和钢试件的试验结果进行了比较。理论结果和试验数据吻合度良好,故它可用于分析纵筋加强圆柱壳失稳后的强度和估算与碰撞研究有关的能量吸收能力。