Mechanical Impedance Measurement on Thin Layer Surface With Impedance Hammer Device
Mechanical Impedance Measurement on Thin Layer Surface With Impedance Hammer Device
复制标题
阻抗锤装置薄层表面机械阻抗测量
DOI：
10.1520/jte20120089
复制
发表时间：
2012
影响因子：
1.2
通讯作者：
W. Keulen
中科院分区：
文献类型：
--
作者：
Mingliang Li;A. Molenaar;M. Ven;W. Keulen
机械阻抗描述了结构在受到给定力时抵抗运动的能力。它作为一个可能影响中频范围（630-1600 Hz）内的轮胎/道路噪声的参数而受到越来越多的关注。本研究利用阻抗锤装置在实验室中测量薄层表面混合物样品的机械阻抗。在测试中，通过用锤子击打样品表面来引起激励。记录振动板的驱动力和加速度的值。然后，可以根据力与通过加速度积分获得的速度的比率来计算机械阻抗。通过比较不同样品的结果，研究了材料性质的影响。还讨论了同一材料的动刚度的进一步测量，并与锤击测量相关。
The mechanical impedance describes the ability of a structure to resist motion when subjected to a given force. It has received increasing attention as a parameter that could influence the tire/road noise in the medium frequency range (630–1600 Hz). In this study, the impedance hammer device is used for measuring the mechanical impedance on thin layer surface mixture samples in the lab. In the test, the excitation is induced by hitting the sample surface with the hammer. Values of the driving force and acceleration of the vibrating slab are recorded. The mechanical impedance can then be calculated from the ratio of the force to the velocity that is obtained by integration of the acceleration. The influence of the material properties were investigated by comparing the results on different samples. A further measurement of dynamic stiffness on the same material is also discussed and related to the hammer measurement.