Experimental investigation of the three dimensional vibration of a small lightweight object

Experimental investigation of the three dimensional vibration of a small lightweight object
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轻质小物体三维振动的实验研究

DOI:
10.1016/j.jsv.2014.05.024
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发表时间:
2015
影响因子:
4.7
通讯作者:
Eberhard
Eberhard
中科院分区:
工程技术2区
文献类型:
--
作者:
Eberhard

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介绍了一种测量小型轻质物体空间振动的实验装置。为了避免传统传感器引起的质量负载效应,使用激光多普勒振动计(LDV)进行非侵入式测量。单点的空间振动是使用三个耦合的单LDV。LDV的光轴被定向为使得它们成对地不平行并且不在一个平面中,并且空间运动从三个激光信号计算。电动平移台用于调整物体上测量点的位置。使用该系统,研究了连接人中耳两个听小骨的生物关节的技术模型。测量两个听小骨上几个点的空间速度和位移,并重建表征关节的听小骨之间的相对运动。利用所描述的测量系统,可以确定小结构的复杂振动模式。
An experimental setup for measuring spatial vibrations of small, lightweight objects is presented. To avoid mass-loading effects caused by conventional transducers, nonintrusive measurements with Laser Doppler Vibrometers (LDVs) are performed. The spatial vibration of a single point is obtained using three coupled single LDVs. The optical axes of the LDVs are orientated such that they are pairwise not parallel and not in one plane and the spatial motion is calculated from the three laser signals. Electrically driven translation stages are used to adjust the position of the measurement point on the object. Using this system, a technical model of a biological joint connecting two ossicles of the human middle ear is investigated. The spatial velocity and displacement of several points on both ossicles is measured and the relative motion between the ossicles, which characterizes the joint, is reconstructed. With the described measurement system, the complex vibration pattern of a small structure can be determined.
DOI: --
发表时间: 1995
期刊:
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