The reduced bending stiffness method is extended to laminates with different moduli in tension and compression, and a new approximate method-twice-approximate method is presented in this paper.
本文把缩减弯曲刚度法推广应用于具有不同拉压模数的层板，并且提出了一种求解具有不同拉压模数的层板问题的新的近似方法——二次近似法。
Meanwhile, the accuracy of the automatic computational method was improved and the cost of constructing the subspace is reduced. The method was applied to the stiffness evaluation of a vehicle body.
同时，通过误差控制实现对子空间的实时更新，在提高快速计算方法的精度的同时减少计算成本。
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