基于合理边界的更高速动车组多专业设计优化

Multidisciplinary design optimization of higher-speed EMUs based on rational boundary

考虑到非光滑与大位移两大非线性影响,作为大型复杂非线性系统的更高速动车组多专业设计优化需回归到合理的轮轨匹配边界条件。文章结合国内外高铁运维实践特殊性,以德国ICE3系列转向架为基础,提出更高速动车组转向架自适应改进方案,并针对该方案下的车体不稳定问题提出半主动车减振技术;通过构建三车组列车多体动力学仿真模型,验证了仅凭半主动车间减振技术即可解决车体不稳定问题;在不同工况下,验证更高速动车组转向架对轨道线路的适应性。结果表明:钢轨专业具备实施低锥度均匀磨耗策略的能力;车辆专业可改善对中央凹陷踏面磨耗的自清理能力;客运专业通过最优交路规划,有条件满足经济镟修要求。

Considering the two nonlinear effects of non-smooth and large displacement,the multidisciplinary design optimization of higher-speed EMUs as a large-scale complex nonlinear system needs to return to rational wheelrail matching boundary conditions.Based on the particularity of high-speed railway operation and maintenance practice at home and abroad,this paper proposes a self-adaptive improvement scheme for higher-speed EMUs bogies based on the German ICE3 series bogies,and the corresponding semi-active inter-vehicle vibration damping technology is suggested for the car body instability of this scheme.By constructing the multi-body dynamics simulation model of three-vehicle train,it is verified that the problem of car body instability can be solved only by semi-active inter-vehicle vibration damping technology.The adaptability of higher-speed EMUs bogies to the track line is verified under various conditions.The results show that the rail profession has the ability to implement the uniform wear strategy under low conicity;the vehicle profession can improve the self-cleaning ability of central hollow tread wear;through the optimal route planning and design,the passenger transport profession is qualified to meet the economic requirements of wheelset reprofiling.