由于弹塑性谱直接考虑了地震记录对单质点体系影响，即能够有和实际结构一样的等效屈服以及破坏过程，所以弹塑性谱的应用是种很有希望的方法。
This seems to be a promising method, as it directly incorporate the influence of the record on an oscillator that can yield and experience damage in a way similar to the structure.
系统中各个质点的相对位移的叠加对外等效为物体表面变形，与之相连的弹簧弹性力的合力等于物体表面的接触力。
The sum of spring forces is corresponded with external force, and the sum of displacement of each node equal to the total deformation.
平砧锻造是塑性大变形问题，本文采用随动坐标系跟踪流动质点，利用能量法分步计算质点位移增量、等效应变场等，然后叠加。
To improve the accuracy of large floating point number calculatation, an iterative approach of inverse transformation for Gauss projection with floating coordinate system is presented.
平砧锻造是塑性大变形问题，本文采用随动坐标系跟踪流动质点，利用能量法分步计算质点位移增量、等效应变场等，然后叠加。
To improve the accuracy of large floating point number calculatation, an iterative approach of inverse transformation for Gauss projection with floating coordinate system is presented.
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