Design Considerations

• It should be noted that a tuned neutralizer makes the response of the primary system zero only at one frequency, namely, . So, the application of such a neutralizer is very much limited.
  
  
• Eventhough the tuned mass damping system could successfully neutralize the vibration response of the primary system when the excitation frequency is ; it also introduces two new resonating frequencies to the original system. Hence, care should be taken such that the two new frequencies are kept sufficiently away from the expected excitation frequency.
  
  
• From equation 16.6, you may note that at , displacement of the secondary mass, . In fact in many system, there is a constraint on maximum permissible value of . This is known as rattle space.

Congratulations! You have finished Lecture 16.