The rigid-flexible coupling dynamics' modeling and modal analysis were employed to study the system consisted of square plansifter and flexible suspender.

针对高方平筛和其上固结的柔性吊杆组成的动力学系统，进行了刚柔耦合的动力学建模和振动模态分析。

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By simulating the track irregularities with trigonometric series method, the train-bridge coupling vibration equations are established based on the combined modal of train formation and the bridge.

利用三角级数法模拟了轨道的不平顺，采用列车编组和桥梁组合的模型，建立了车桥耦合振动方程。

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Secondly, the whole vehicle rigid-flexible coupling modal equipped with the frame is built and analyzed to obtain the load histories through driving on cross-country path and strengthen-road .

其次建立该整车的刚柔耦合动力学模型，并进行越野路、强化路等路面的整车动力学仿真，得到相应的模态位移时间历程；

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