On the basis of energy-equivalence principle, the hysteretic structure considered is converted into a combination of a damping dissipation part and a nonlinear elastic structure.
根据能量等效的思想，把滞变结构等效为一个阻尼损耗和一个非线性弹性结构的组合。
When the structure keeps elastic except for the local nonlinearities, the fast nonlinear analysis (FNA) method is desirable for an elastic response history analysis.
当结构局部非线性而其它大部分为弹性时，方程可以采用“快速非线性分析”（FNA）方法求解。
When the structure keeps elastic except for the local nonlinearities, the so-called fast nonlinear analysis (FNA) method is desirable for an elastic response history analysis.
当结构局部非线性而其它大部分为弹性时，方程可以采用所谓“快速非线性分析”（FNA）方法求解。
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