boundary stiffness matrix

例句：

1. 1. The boundary stiffness matrix is crucial for the stability ofthe structure.
   边界刚度矩阵对于结构的稳定性至关重要。
2. 2. The engineer used the boundary stiffnessmatrix to calculate the stress distribution in thematerial.
   工程师使用边界刚度矩阵来计算材料中的应力分布。
3. 3. The boundary stiffness matrixwas used to simulate the behavior of thefluid under different conditions.
   边界刚度矩阵被用来模拟流体在不同条件下的行为。