颗粒轨道模型；
轨道桥梁的模型。
本文建立了轨道结构空间自由振动模型。
In this paper, the space free vibration analysis model for track structure is established.
根据轨道动力学理论，建立了近距离空间拦截轨道的数学模型。
Based on orbit dynamic theory, the close interception model was set up.
对大多数轨道系统来说，离散化模型更具有代表性。
A discrete model appears more representative of reality for the majority of track.
对大多数轨道系统来说，离散化模型更具有代表性。
A discrete model appears more representative of reality for the majority of track.
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