本文证明了关于对称泛函临界点的一个定理并用以研究非线性椭园型偏微分方程的多重解。

In this paper we prove a theorem for the critical points of symmetric functionals through which we research the multiple solutions of nonlinear elliptic PDE.

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在某些简化假定的前提下，导出了流体对园柱壳塑性动力反应影响的解析解和主要参数之间的关系。

Under some simplify conditions, an analytic solution and a relationship among main parameters have been obtained for the influence of fluid on the dynamic plastic response of the cylindrical shell.

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采用全量理论和幂级数形式的应力一应变曲线，导出了弹塑性强化材料旋转园盘的渐近解。

Based on the stress - strain curve uith Power series, the asymptotic nalytical solution of rotating disks uith strain-hardening is obtained from the total strain theory.

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