不同型号钻头对激振源规律影响的实验研究。
Secondly, the different model bits affect the rule of the vibration sources, which is studied.
运用机械振动理论分析了发动机机体正常振动时的激振源和振动形式。
The paper analyzed the exciting vibration sources and forms while engine normal vibrating by means of mechanic vibration theory.
试验及分析表明，该车摆振主要为强迫振动，通过控制激振源、增大转向系统阻尼可抑制摆振。
The test and analysis show that the shimmy is a forced vibration and can be restrained by controlling excitation source and increasing steering system damping.
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