超声珩磨时双空化泡的振动特性

Vibration Performance of Double Cavitation Bubbles in Ultrasonic Honing

为了研究超声珩磨作用下磨削液中空化泡的非线性振动特性,基于超声珩磨时双空化泡的动力学理论,推导了磨削液中双空化泡振动位移模型,并对磨削液中双空化泡共振频率与振动位移的关系进行了数值模拟.研究结果表明:磨削液中双空化泡间距对空化泡共振频率和振动位移影响明显;双空化泡处于最佳间距下空化泡会发生剧烈共振,而在其它间距下空化泡振动微弱,为下一步预测及控制磨削液中的空化效应提供了理论支撑.

In order to investigate the nonlinear oscillation of cavitation bubble under ultrasonic honing in grinding fluid, based on the double cavitation bubbles dynamics theory, the vibration displacement model of double cavitation bubbles in the grinding fluid was derived. The relationship between the resonant frequency and displacement model of double cavitation bubbles was numerically simulated. The results present that the influence of the distance between two bubbles on the resonant frequency and displace- ment is obvious. There is an optimum distance between two bubbles in the grinding fluid. The bubble vibration is violent resonance when the distance between two bubbles is in the optimum, but in other distances, the vibration of a cavitation bubble is weak. It provides theoretical support for further predicting and controlling the cavitation effect in grinding fluid.