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。
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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