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引言机床的固有频率和阻尼系数的识别是研究机床抗振性的一个重要方面。识别机床的各阶固有频率和阻尼系数一般用激振法。这种方法都在机床非工作状态下进行的。如应用正弦激振法,它只能摸拟机床本身的强迫振源(如电机、皮带轮及齿轮等),而机床实际的振动则是正弦和随机振动的叠加。并且用激振法一般只能判断出
Introduction The identification of machine tool’s natural frequency and damping coefficient is an important aspect to study machine vibration resistance. Identify the various steps of the machine tool natural frequency and damping coefficient commonly used excitation method. This method is carried out in the non-working state machine. If the application of sinusoidal excitation method, it can only simulate the machine itself forced vibration source (such as motors, pulleys and gears, etc.), and the actual machine vibration is sine and random vibration superposition. And with the general method of excitation can only determine