Swaminathan Anand, Poese Matthew E, Smith Robert W M, Garrett Steven L
Graduate Program in Acoustics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
Applied Research Laboratory, The Pennsylvania State University, State College, Pennsylvania 16804, USA.
Rev Sci Instrum. 2015 Nov;86(11):116102. doi: 10.1063/1.4935148.
This note describes a shaker system capable of high peak-velocity, large amplitude, low frequency, near-sinusoidal excitation that has been constructed and employed in experiments on the inhibition of Rayleigh-Bénard convection using acceleration modulation. The production of high peak-velocity vibration is of interest in parametric excitation problems of this type and reaches beyond the capabilities of standard electromagnetic shakers. The shaker system described employs a kinematic linkage to two counter-rotating flywheels, driven by a variable-speed electrical motor, producing peak-to-peak displacements of 15.24 cm to a platform mounted on two guide rails. In operation, this shaker has been demonstrated to produce peak speeds of up to 3.7 m/s without failure.
本笔记描述了一种振动台系统，该系统能够产生高峰速度、大幅度、低频、近似正弦的激励，已被构建并用于通过加速度调制抑制瑞利-贝纳德对流的实验中。这种高峰速度振动的产生在这类参数激励问题中具有重要意义，并且超出了标准电磁振动台的能力范围。所描述的振动台系统采用了一种运动连杆机构连接到两个反向旋转的飞轮，由一台变速电机驱动，可使安装在两条导轨上的平台产生峰峰值为15.24厘米的位移。在运行中，该振动台已被证明能够产生高达3.7米/秒的峰值速度且无故障。
