Experimental Investigation of Dynamic Normal Characteristics of Machined Joint Surfaces
Experimental Investigation of Dynamic Normal Characteristics of Machined Joint Surfaces
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DOI：
10.1115/1.1287589
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发表时间：
2000-10
期刊：
影响因子：
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通讯作者：
W. Fu;Y. M. Huang;X. L. Zhang;Q. Guo
中科院分区：
文献类型：
--
作者：
W. Fu;Y. M. Huang;X. L. Zhang;Q. Guo
本文对几种机械加工结合面的法向动态特性进行了实验研究，研究了在不同连接条件下，包括连接材料、介质、加工方法、表面粗糙度等，法向动刚度和阻尼随激振频率、相对位移和静预紧力的变化规律，通过建立结合面的理论模型，从实验数据中提取出结合面参数，并对其机理进行了定性分析。研究结果表明，在本文试验范围内，接头表面的刚度和阻尼系数随静预紧力的增加而增加，干接头的刚度与激振频率无关，而干接头和油接头的阻尼系数均随激振频率的增加而减小;较小的相对位移对接头的动态特性没有明显影响。激振频率和静压的影响大小与接头条件有关。
This paper presents an experimental investigation on the normal dynamic characteristics of several machined joint surfaces, i.e., the varying principle of the normal dynamic stiffness and damping with exciting frequency, relative displacement and static pre-load under different joint conditions, including joint materials, mediums, machining methods and surface roughness, etc., The joint parameters are extracted from experimental data by establishing the theoretical model of the joint surfaces, and the mechanism is analyzed qualitatively. The studied results show that, in the test range of this paper, the stiffness and damping coefficient of the joint surfaces increase with the static pre-load, the stiffness for a dry joint is independent of the exciting frequency, while the damping coefficients for both a dry and an oiled joint decrease with the exciting frequency; little relative displacement has no marked effect on the dynamic characteristics. The amount of influence of exciting frequency and static pressure is related to the joint conditions.