Discussion
The half-power bandwidth method obtains the damping ratio from
Answer: B
Correct answer: the width of the resonance peak at \( 1/\sqrt{2} \) of its height
The method uses the shape of the frequency response curve. The frequencies either side of resonance at which the amplitude falls to \( 1/\sqrt{2} \) of the peak bound a band whose width gives the damping:
\[ \xi = \frac{f_2 - f_1}{2f_n} \]
Light damping gives a sharp peak and a narrow band, heavy damping a broad one. It requires a forced vibration test with a swept frequency, where the logarithmic decrement needs only a decay record - the two methods suit different experimental means.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development