damped natural frequency การใช้

• This is called the damped resonance frequency or the damped natural frequency.
• The damped natural frequency is less than the undamped natural frequency, but for many practical cases the damping ratio is relatively small and hence the difference is negligible.
• The frequency in this case is called the " damped natural frequency ", f _ d, and is related to the undamped natural frequency by the following formula:
• Therefore, the damped and undamped description are often dropped when stating the natural frequency ( e . g . with 0.1 damping ratio, the damped natural frequency is only 1 % less than the undamped ).