在前一部分的基础上，建立了非完善的复合材料圆柱壳稳定性问题的基本控制方程。
Based on the previous part, the buckling governing equations of the imperfect shells are established.
首先，文章对列车空气动力学的理论进行了研究，推导出动车周围三维流场的基本控制方程。
Firstly, it studies the theory of train aerodynamics and derives the basic control equation of the three-dim.
建立基本控制方程组，详细介绍了VOF中的PLIC界面捕捉方法的基本原理，并对模型进行了验证。
Describe the governing equations and details of VOF tracking technique using a piecewise-linear interface calculation (PLIC) in each cell.
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