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为了分析单层双层集装箱车体振动特征及成因,利用柔性体接口处理技术对策(ITTS),建立了单层双层集装箱专用车辆刚柔耦合模型,并进行了整车模态分析对比和基于轨道谱的车体振动特征分析对比。这两种车体的结构型式是截然不同的,单层车体是利用一根纵梁构成的“鱼刺”形结构,而双层车体则是利用两个边梁构成的“落下孔”型结构。在三大件转向架的摇枕悬挂中,斜楔摩擦“卡滞”所产生的动力作用使单层车体形成了具有二阶垂向弯曲模态振动特征的弹性振动。由于通用转向架的摇枕悬挂与双层集装箱装载方式所形成的惯性特征不匹配,双层车体运动模态振动频率过低,如点头、摇头和侧滚等,造成车体结构产生伴随模态振动。因为双层车体具有“落下孔车”结构特征,其横向稳定性比较差,因而双层车体弹性振动特征与装箱方式有关,只有在上下20 ft×2装箱时才出现一阶弯曲模态振动,其他装箱方式则主要表现为车体横向振动。
In order to analyze the characteristics and causes of single-deck double-deck container body vibration, a rigid-flexible coupling model of a single-deck double-deck container vehicle is established by using ITTS technology. The modal analysis of the single- Analysis and Comparison of Vehicle Vibration Characteristics of Orbital Spectrum. The structure of these two kinds of car body is quite different. The single-layer car body is a “fishbone” structure using one longitudinal girder, while the double car body is formed by using two side girders. Hole “type structure. In the bolster suspension of the three-piece bogie, the dynamic action generated by the wedge friction ”jamming“ causes the single-layer body to form the elastic vibration with the second-order vertical bending mode vibration characteristics. Due to the mismatch between the bolster suspension of universal bogie and the inertial feature formed by double-deck container loading mode, the vibration frequency of double-body body is too low, such as nodding, shaking head and rolling, resulting in concomitant formation of body structure State vibration. Because the double-body body has ”falling hole car " structural features, its lateral stability is relatively poor, so the double-body body elastic vibration characteristics and packing method, only 20 ft × 2 boxes up and down only when a Order bending mode vibration, the other packing method is mainly manifested as the body lateral vibration.