since both cables are , as discussed above , at different tensions , it is evident that each has a slightly different natural frequency of vibration .
因为是两缆绳,如上所述,在不同的紧张,它是显然的其中每一有振动一个轻微地不同的固有频率。
then the author analyses the effect of the frame vibration and tries to make the natural frequency of vibration beyond the range of engine revolution rate.
分析了发动机振源对车架振动的影响,使车架主要模态的自振频率避开了发动机转速范围;
sa (spectral acceleration) is approximately what is experienced by a building, as modeled by a particle on a massless vertical rod having the same natural frequency of vibration as the building.
the result shows that the wind-resisting circle and enhanced circle have a great impact on the natural frequency of vibration and modes of storage tank analyzed.