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本文利用模态分析法对组合机床动力滑台滑座与侧底座系统进行了研究。找出了决定该系统振动性质的主要几阶振动模态,确定了各阶模态参数。分析了产生各阶模态振动的结构原因,提出了减少系统振动的方法。这对改进结构设计具有一定的价值。试验中选用英国Solartron1172型频率响应分析仪进行动态测试。参数识别时对各阶主模态参数进行了最小二乘法曲线拟合,并利用剩余柔度对主模态参数进行限制,使得所建立数学模型的频率响应曲线能很好地收敛于实测频响曲线。
In this paper, modal analysis is used to study the sliding table and side-base system of the combined machine tool power slide. The main vibration modes that determine the vibrational properties of the system are found, and the modal parameters of each step are determined. The structural causes of each mode vibration are analyzed, and the method to reduce the system vibration is proposed. This is of some value to improving the structural design. Test selected British Solartron1172 frequency response analyzer for dynamic testing. In the parameter identification, the least squares curve fitting was carried out for the main mode parameters of each order, and the remaining modalities were used to limit the main mode parameters so that the frequency response curve of the established mathematical model could well converge to the measured frequency response curve.