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推导了铁路货车K6转向架的二系悬架在楔块处的等效纵向刚度,并在模型中对此刚度应用并验证。首先,根据力学理论知识,分析摇枕相对于侧架纵向运动时,两者的受力情况,从而推导出摇枕所受到的纵向力与摇枕的纵向位移之间的关系;接着基于SIMPACK轮轨运动仿真平台完成了C70敞车多体动力学的建模与仿真,通过与实测的数据对比,验证了模型的正确性,最后在此模型的基础上,利用纵向等效刚度计算出C70敞车的临界车速。
The equivalent longitudinal stiffness of the secondary suspension of K6 bogie on the wedge is deduced and applied in the model and verified. First of all, based on the mechanics theory knowledge, analyzing the force of the bolster relative to the longitudinal movement of the side frame, the relationship between the longitudinal force and the longitudinal displacement of the bolster is deduced; Then, based on the SIMPACK wheel The simulation platform of the railroad movement completed the modeling and simulation of the multi-body dynamics of the C70 gondola. The correctness of the model was verified by comparison with the measured data. Finally, based on this model, the longitudinal equivalent stiffness was used to calculate the C70 gondola Critical speed.