The derivation of generalized variational principles with preconditions by the use of the Lagrange multiplier method.
应用拉氏乘子法推导有先决条件的广义变分原理。
A calculation method is proposed to determine the crack tip stress intensity factors for sections on the basis of zonal generalized variational principles.
本文应用分区广义变分原理，提出了求解含有裂纹的型材应力强度因子的计算方法。
A calculation method is proposed to determine the crack tip stress intensity factors for sections on the basis of zonal generalized variational principles.
本文应用分区广义变分原理，提出了求解含有裂纹的型材应力强度因子的计算方法。
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