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为了分析CRH5动车组动力学性能,提出高速转向架的线性与非线性模型,并进行整车运动模态、临界速度和轮轨力等方面的对比分析.高速转向架的悬挂系统既具有明显的线性特征,如悬挂特性,又存在诸多非线性影响因素,如一系悬挂中的轮对定位装置、二系悬挂中的抗侧滚扭装置和横向止挡等.由于高速转向架运行速度范围宽,减振器阻尼作用使两级悬挂形成了低速与高速悬挂特性.对于高速车辆而言,影响临界速度的非线性因素主要来自于转向架,同时,在非线性稳态曲线通过时,转向架的诸多非线性因素会对轮轨力产生重要影响.仿真对比分析表明:上述分析与ALSTOM计算结果基本吻合,而且非线性模型更加有利于揭示非线性因素对高速转向架动力学性能的影响规律.
In order to analyze the dynamic performance of the CRH5 EMU, linear and nonlinear models of the high-speed bogie are proposed, and the comparative analysis of the vehicle’s motion mode, critical speed, wheel-rail force and etc. The suspension system of high-speed bogies not only has obvious Linear characteristics, such as suspension characteristics, there are many non-linear factors, such as the wheel alignment device in a suspension system, the anti-roll-off device in the secondary suspension and transverse stop, etc. Due to the wide range of running speed of high-speed bogies, The damping effect of the shock absorber makes the two-stage suspension form the low-speed and high-speed suspension characteristics.For high-speed vehicles, the nonlinear factors that affect the critical speed mainly come from the bogie, meanwhile, when the nonlinear steady-state curve passes, Many nonlinear factors have an important influence on the wheel-rail force.The simulation analysis shows that the above analysis is in good agreement with the ALSTOM calculation results, and the nonlinear model is more conducive to reveal the influence of nonlinear factors on the dynamic performance of high-speed bogies.