Study the bearings parts blemish causes the round to the characteristic and regulations of the structure resonance, establishment mathematics physics model.

研究轴承部件缺陷引起轮对结构共振的特征及规律，建立数学物理模型；

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The dynamic mathematics model is established from the actual physics objects in this paper.

根据实际的物理对象，本文建立了系统三自由度动态数学模型。

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According to the physics and mathematics model of two-dimensional unsteady heat conduction, we wrote the visualization software.

根据二维非稳态导热的数学模型和物理模型，编写了可视化软件。

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