中心差分法是指结构动力学中的中心差分法是基于用有限差分代替位移对时间的求导，对位移一阶求导得到速度，对位移二阶求导得加速度。
若提高测量仪表精度，则中心差分法估计方差相对值明显改善，可提高到10%以内。
If we heighten the precision of measuring equipment, the central difference's relative error of the estimation variance improved great, which is less than 10%.
本文采用三维有限元和中心差分法对一个具有一定取向的层板在冲击载荷下进行了动力分析。
The dynamic analysis of a layered fiber-reinforced composite laminate subject to a given impact loading has been made with a three dimensional finite element and central difference method.
本文应用一致性时域有限差分法（FDTD）和近场远场变换计算散射声目标的反射声压强度，找出反射声压级与目标声中心到换能器间距离的关系。
Using the finite difference time-domain (FDTD) method and near field to far field transformation, pressure of the reflected sound from the scattering target is calculated.
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