转向架变刚度轴箱转臂定位节点AMESim模型建立及应用研究

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关键词：铁道车辆；变刚度转臂节点；AMESim非线性力学模型;频变特性;动力学性能 中图分类号：U270.331 文献标志码：B doi：10.20213/j. cnki. tdcl. 2025.02.014

Abstract： This paper introduces the rotary arm node with variable stiffness. A nonlinear mechanical model of the node is established by using AMESim software according to its structural characteristics and working principle，and the accuracy of the model is verified by comparing with the test results. Based on the nonlinear mechanical model， the influence of key parameters of node with variable stiffness on their dynamic characteristics is studied.Finally，the co-simulation of AMESim and SIMPACK is carried out.The results indicate that the nonlinear mechanical model can better reflect the mechanical characteristics of the actual model.When the external excitation frequency is low，the stifness of nodes is low，mainly the stiffness of rubber components. When the external excitation frequency increases，its stiffness gradually increases. The dynamic performance of rotary arm node with variable stiffness is afected by several parameters，among which the parameters related to rubber elements have a great influence on the dynamic characteristics of rotary arm nodes，while a smallinfluence on the parameters related to inertial channels. Compared to using traditional positioning nodes，the critical speed of the vehicle using rotary arm node with variable stifness is enhanced by （20 2.9% and the derailment coeficient is decreased by 13% ，thereby enhancing the safety of curve negotiation and ensuring the vehicle's stability while operating in a straight line.

Key words：railway vehicle；rotary arm node with variable stiffness；AMESim nonlinear mechanical model；frequency variation characteristics；dynamic performance

近年来铁道车辆发展迅猛，其直线运行稳定性与曲线通过性能是矛盾关系。（剩余8766字）