Model for Tangential Contact Damping Energy Dissipation Factor of Plane Joint Interfaces
Model for Tangential Contact Damping Energy Dissipation Factor of Plane Joint Interfaces
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DOI：
10.1088/1755-1315/186/4/012029
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发表时间：
2018-10
期刊：
影响因子：
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通讯作者：
J. Shen;Hongbo Yan;Jiajun Yang
中科院分区：
文献类型：
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作者：
J. Shen;Hongbo Yan;Jiajun Yang
综合应用赫兹接触理论和分形方法，提出了平面结合面切向接触阻尼耗能因子模型。通过单个微凸体的能量损失方程估算了整个节理面的能量耗散。根据微凸和微滑移过程中的切向力，将微凸体的储能等效为微凸体的储能，得到整流器复合表面的储能。在能量损失和能量储存唯一换算的基础上，建立了一个模型。该模型避免了实验测试的不变性，增强了理论推导的可视化，能够更直观地理解阻尼耗散因子的性质。通过数值模拟得到了相关参数的影响规律。可以看出，在粗糙度不变的情况下，切向阻尼损耗因子随D的增大先减小后增大。当D约为1.25时，D达到最小值。当D小于1.5时，粗糙度参数与阻尼耗散因子成正比关系，当分形维数恰好为1.5时，粗糙度参数不产生影响，当D大于1.5时，粗糙度增大，阻尼耗散因子同时减小。通过与实验数据的对比，发现数值模拟结果与实际情况较为吻合，说明该模型在一定条件下是有效的。
Due to the comprehensive applications of Hertz contact theory and fractal method, we present the model for tangential contact damping energy dissipation factor of plane joint interfaces. The energy dissipation of the entire joint surface is estimated by energy loss equation of single micro-convex body. According to the tangential force in process of micro-convex and micro-slip, the energy storage of the micro-convex body is replaced by the equivalent, and the energy storage of the composite surface of the rectifier is obtained. On the basis of the unique conversion of energy loss and storage, a model is established. The model avoids the invariance of experimental test and enhances the visualization of theoretical derivation, and can more intuitively understand the properties of damping dissipation factor. The influence law of related parameters is obtained by numerical simulation. We can see that damping loss factor of tangential decreases first and then increases when D increase and the roughness arguments are constant. When D is about 1.25, the D reaches the least value. If the D is less than 1.5, the roughness parameter and directly proportional damping dissipation factor relations, when the fractal dimension is 1.5 exactly, the roughness parameters do not produce effect, when the D is larger than 1.5, the increase of roughness, dissipation factor decreases at the same time. Comparing with the laboratory data, the results obtained by numerical simulation are in accordance with the actual situation is found. Therefore, the model is effective in certain conditions.