27/11/2024
If you watch the video, you will see that when the natural frequency of vibration of the 2 tuning forks match (both at 260 Hz), vibration of one of the tuning forks induce vibration in the other as can be witnessed by the second tuning fork knocking the ball although it was not the one hit or excited and when their frequencies do not match (one is 260 Hz and the other 240 Hz), vibrating one tuning fork has no effect on the other.
For this reason, we do not want a building's natural frequency of vibration to match that of an earthquake because if they match the earthquake will excite the building in the same way the second tuning fork is excited causing large displacements and eventually collapse. This phenomenon is called resonance and in all our designs at Phillips Engineers Inc. Ltd, we make sure we modify our buildings' natural frequencies of vibration away from those of common earthquakes in the local area to minimise the probability of occurrence of resonance in our buildings during earthquakes. For your safety, choose Phillips Engineers Inc. Ltd.
Disclaimer: This video is used for the purpose of illustration only. No copyright infringement is intended.
