The Effect of Boundary Conditions on Resonant Ultrasonic Spherical Chains.
The Effect of Boundary Conditions on Resonant Ultrasonic Spherical Chains.
复制标题
边界条件对谐振超声球链的影响。
DOI：
10.1109/tuffc.2016.2576563
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Akanji O
中科院分区：
文献类型：
--
作者：
Akanji O
在超声波频率下，研究了球体共振链对夹持器材料变化和预压的响应。该系统被发现对这些参数非常敏感，从只有特定链长和支架材料才能看到的窄带宽输入产生脉冲波形。此外，使用已知的预加压力，使用校准的触针布置，进行了仔细的实验。在可以忽略的预压缩水平上，在链条内产生脉冲，然后通过增加预压来抑制这些脉冲。随之而来的是传播速度的巨大变化，因为系统逐渐从强烈的非线性转变为更强的线性。用离散模型对每个球体的运动进行了模拟，模拟结果与实验数据吻合较好。
The response of a resonant chain of spheres to changes in holder material and precompression is studied at ultrasonic frequencies. The system is found to be very sensitive to these parameters, with the creation of impulsive waveforms from a narrow bandwidth input seen only for certain chain lengths and holder materials. In addition, careful experiments were performed using known amounts of precompression force, using a calibrated stylus arrangement. At negligible precompression levels, impulses were generated within the chain, which were then suppressed by increased precompression. This was accompanied by large changes in the propagation velocity as the system gradually changes from being strongly nonlinear to being more linear. Simulations using a discrete model for the motion of each sphere agree well with the experimental data.