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首页> 外文期刊>International journal of impact engineering >Twin-characteristic-parameters analysis for elastic dynamic buckling of thin cylindrical shells under axial step loading
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Twin-characteristic-parameters analysis for elastic dynamic buckling of thin cylindrical shells under axial step loading

机译：轴向阶梯载荷作用下薄圆柱壳弹性动力屈曲的双特征参数分析

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The relations of the critical stress and transverse inertia effect to the loading duration are investigated for the dynamic buckling of thin cylindrical shells under axial step loading. The critical stress and the inertial exponent are treated as the two characteristic parameters. The criterion of energy conservation is used to derive the supplementary restraint condition for buckling deformations at compression wave front. By use of the Galerkin method, an algebraic eigenvalue problem for the two characteristic parameters is derived from the governing equations and boundary conditions. The solution of the eigenvalue problem, which satisfies the supplementary restraint condition, gives the values of the critical stress and the inertial exponent for the dynamic buckling. The relation of critical stress to loading duration, predicted by the theoretical analysis, is in reasonable agreement with the experimental results.
机译：研究了薄壁圆柱壳在轴向阶跃载荷下的动态屈曲的临界应力和横向惯性效应与载荷持续时间的关系。临界应力和惯性指数被视为两个特征参数。利用能量守恒准则推导了压缩波前屈曲变形的补充约束条件。通过使用Galerkin方法，从控制方程和边界条件导出了两个特征参数的代数特征值问题。满足补充约束条件的特征值问题的解给出了动态屈曲的临界应力和惯性指数的值。理论分析预测的临界应力与加载持续时间的关系与实验结果基本吻合。

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