What does resonance mean?
The so-called resonance is a very high-frequency technical term in physics, which refers to the situation that the vibration amplitude of a physical system at a specific frequency is greater than other frequencies. These specific frequencies can be called "resonance frequencies".
Resonance is a very common natural phenomenon, which can be observed in almost all branches of physics and many interdisciplinary subjects, and can also be observed in various fields of engineering technology, and should be applied to it.
For example, in the design, manufacture and installation of various buildings such as bridges and docks and mechanical equipment such as airplanes, automobiles, ships and engines, it is necessary to consider the problem of preventing resonance in order to make the building structure work safely and the machinery work normally.
High-rise structures are prone to resonance, such as vortex vibration of Humen Bridge No.5, which may occur. In order to avoid resonance caused by eddy current vibration, it is necessary to take measures to prevent it.
If the natural frequency of the component is close to the frequency of vortex release, the structure will be damaged by resonance. The main measures that can be taken are as follows: first, strengthen the rigidity of the component, or increase the scale to improve its rigidity, and change the natural frequency of the component to avoid it approaching the frequency of vortex release.
The second is to find ways to change the wake field behind the component and destroy the regularity of vortex discharge in the wake field, such as installing spiral risers on the structure and changing the cross-sectional shape of the structure.