不同条件下阻尼片对音叉受迫振动的影响

Influence of damping sheets on the forced vibration of tuning fork under different conditions

本文实验上研究了不同阻尼片的面积、形状、固定角度和相对位置对音叉受迫振动体系的影响,研究表明在相同形状下、不同面积的阻尼片,周期的平方与阻尼片的面积成正比;相同面积、不同形状的阻尼片对应的共振频率和灵敏度都不同,长方形的灵敏度更大,三角形的灵敏度较小;相同形状、相同面积的阻尼片,音叉受迫振动的共振频率与阻尼片固定位置和固定角度都有关系.本研究对音叉传感器的设计有一定的指导意义.

The effects of the area, shape, fixed angle and relative position of damping plate on the forced vibration system of the tuning fork are studied experimentally. The experimental results have shown that the square of the period is proportional to the area of the damping plate under the same shape. Damping plate with the same area and different shapes have different resonance frequencies and sensitivities. The sensitivity of the rectangle is larger, and the sensitivity of the triangle is smaller. The resonance frequency of forced vibration of the tuning fork is related to the fixed position and the angle of the damping plate with the same shape and area. The result obtained in this research is certain guiding to the design of tuning fork sensor.