... - docin.com豆丁网 ent Method, BEM); (5) 矩量法(Moment Method, MM)； (6) 时域有限差分法(Finite Time Differential Method, FTDM)。 83/139 FDM：基于差分原理的一种数值计算法。
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The time history curves and the phase diagram for the oscillation are obtained by solving the differential relation between vibration amplitude and tensile load with finite difference method.
应用有限差分法求解球壳振动的振幅和外加荷载之间的微分关系，得到了球壳振动的时程和相图。
First, the partial differential equations are transformed into discrete space, discrete time nonlinear difference equations through characteristic method and finite difference approach.
首先，通过特征线法和有限差分法得到了时间离散和空间离散的非线性状态方程。
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