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缓冲器的动力学特性在较大程度上决定着列车纵向动力学性能。传统缓冲器的阻抗特性曲线未能完整描述阻抗力与缓冲器行程变化率之间的关系,并且存在间断点。在列车纵向动力学应用中,引起很多难以克服的困难。本文以摩擦式缓冲器为研究对象,利用接触力学方法,给出阻抗力与缓冲器行程变化率之间的关系;根据处理静摩擦开关效应的相关理论,提出一种处理阻抗力曲线间断点的实用方法。数值算例验证了所提方法的合理性。
The dynamic characteristics of the shock absorber to a large extent determine the longitudinal dynamics of the train. The impedance characteristic of the conventional snubber fails to fully describe the relationship between the resistance force and the rate of change of the snubber stroke, and there is a break point. In the train longitudinal dynamics applications, a lot of hard to overcome difficulties. In this paper, the friction damper is taken as the research object, and the relation between the resistance force and the change rate of the stroke of the damper is given by using the contact mechanics method. According to the related theory of dealing with the static friction switch effect, method. Numerical examples verify the rationality of the proposed method.