三大件式转向架摩擦悬挂系统性能的多体系统评价
Evaluation of frictional suspension system performance in three-piece bogie by the multi-body-system approach
摘要：
研究了货车转向架二系悬挂摩擦楔在单向接触和非光滑摩擦力作用下的非线性阻尼特性。在所提出的多体系统模型中，每个楔形体具有六个自由度，并具有相应的惯性特性。在建模中还考虑了楔块的几何形状、楔角、前束条件以及楔块/摇枕和楔块/侧架之间的间隙。提出了接触参数识别的方法，以实现平滑的响应和高效的数值解。与所提出的方法的系统的响应进行比较，准静态方法的楔形模拟和替代方法的局限性突出。然后，该模型被应用到评估楔系统的垂直和横向响应的不同的设计参数的影响。
英文摘要：
The nonlinear damping characteristics of friction wedges in the secondary suspension of a freight bogie are investigated considering unidirectional contact and non-smooth frictional forces. In the proposed MultiBody System model, each wedge has six Degrees of Freedom with corresponding inertial properties. The geometry of wedge, as well as, wedge angle, toe-in condition, and clearances between wedge/bolster and wedge/side frame are also considered in the modeling. The methodology for the identification of contact parameters is presented to achieve a smooth response and efficient numerical solutions. The response of the system with the proposed method is compared with the quasi-static methodology of wedge simulation and limitations of alternative methods are highlighted. The model is then applied to evaluate the effects of different design parameters of the wedge system on vertical and lateral response of the system.
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