论文部分内容阅读
在常规的机车车辆动力学仿真中,通常不考虑轮对的纵向自由度,可以说轮对纵向振动问题是一个长期以来被忽略的内容.本文的研究发现轮对纵向振动虽然对整车的横向稳定性影响不大,但却对整车的垂向动力学有很大的影响.当轮对纵向振动较大时,会导致机车发生纵向伴随点头的振动,恶化机车的垂向动力学性能.进一步的分析发现,剧烈的轮对纵向振动与轨道的垂向和水平不平顺关系密切.同时存在这两个不平顺是产生轮对纵向共振的前提,在光滑的轨道上不会有纵向共振发生.
In the conventional simulation of rolling stock dynamics, the longitudinal freedom of the wheelset is not usually considered, so it can be said that the longitudinal vibration of the wheelset is a long-neglected issue.The research of this paper shows that the longitudinal vibration of the wheelset, However, it has a great influence on the vertical dynamics of the vehicle.When the longitudinal vibration of the wheelset is large, it will lead to the longitudinal vibration of the locomotive, which will deteriorate the vertical dynamic performance of the locomotive. The further analysis shows that the vertical vibration of the wheelset is closely related to the vertical and horizontal irregularities of the track.At the same time, the two irregularities are the prerequisites for the longitudinal resonance of the wheelset, and no longitudinal resonance will occur on the smooth track .