Parametric instability or resonance is more dangerous than ordinary resonance as it is characterized by exponential growth of the response amplitudes even in the presence of damping.
参数不稳定或共振比普通共鸣，因为它是由具有危险反应指数增长幅度甚至在阻尼的存在。
The result displays that the horizontal steady-state vibration is little affected by vertical Chulomb damping parametric excitations.
结果表明，竖向阻尼参激对水平稳态振动的影响不大。
The result displays that the horizontal steady-sta te vibration is little affected by vertical Coulomb damping parametric excitations.
结果表明， 竖向阻尼参激对水平稳态振动的影响不大。
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