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针对六轴机车的动力学性能,建立了较为详细的机车在弹性结构轨道上运行时的空间耦合动力学模型。对于机车子模型,假设车体、转向架和轮对均为刚体,各部分通过两系悬挂连接起来,形成一个多自由度质量-弹簧-阻尼系统,每个刚体均具有5个自由度,整个机车模型共有45个自由度。对于轨道模型,左右两股钢轨均视为连续弹性离散点支承基础上的无限长Euler梁,并考虑钢轨的垂向、横向及扭转振动;轨枕视为刚性体,并考虑轨枕的垂向、横向及转动;道床离散为刚性质量块,只考虑道床垂向振动。而对于轮轨关系模型,采用了先进的空间耦合关系模型。最后结合工程实际,给出了SS7E电力机车在弹性结构轨道上的运动稳定性仿真应用实例。
Aiming at the dynamic performance of six-axle locomotive, a more detailed dynamic coupling model of the locomotive on the elastic structure track is established. For a locomotive submodel, assuming that the body, bogies and wheelsets are all rigid bodies, the parts are connected by two series of suspensions to form a multi-degree-of-freedom mass-spring-damping system with five degrees of freedom for each body, The locomotive model has a total of 45 degrees of freedom. For the orbit model, the left and right rails are regarded as infinite Euler beams on the basis of continuous elastic discrete point support, considering the vertical, horizontal and torsional vibration of the rail; the sleeper is regarded as a rigid body and considering the vertical and horizontal directions of the sleeper And turning; the discrete bed is a rigid mass, only vertical vibration of the ballast bed is considered. For wheel-rail relational models, an advanced spatial coupling relational model is used. Finally, the practical application of the SS7E electric locomotive on the stability of the elastic structure is given.