On this account, the classical Euler's formula based on constant coefficient of friction is thus revised.
考虑到这个因素，对按照摩擦系数为常数而推导出来的欧拉公式进行了修正。
The error analysis of different empirical formula of friction factor is done and the applicable range of these formula is given as well.
笔者对计算摩擦系数的一些经验公式进行了误差分析，对经验公式的应用范围提出了个人的看法。
When friction changing frequency is very close to natural frequency, there will be resonance from the vibration displacement response formula.
由系统振动位移响应公式得出，当摩擦力变化频率与系统固有振动频率非常接近时就会出现共振。
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