The Equation Of A Damped Harmonic Oscillation Is Given By 8(d2y/dt2) +24(dx/dt) + 48y =0. Find The Frequency Of The Damped Oscillations.
The Equation Of A Damped Harmonic Oscillation Is Given By :-
8(d2y/dt2) +24(dx/dt) + 48y =0.
Find The Frequency Of The Damped Oscillations
Ans) Method 1:-
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Here's how to find the frequency of the damped oscillations from the given equation:
1. Identify the coefficients:
The coefficient of the second derivative term (8) represents the mass (m).
The coefficient of the first derivative term (24) represents the damping coefficient (b).
The coefficient of the position term (48) represents the spring constant (k).
2. Calculate the natural frequency:
The natural frequency (ω_0), which is the frequency of the system without damping, is given by:
ω_0 = √(k/m) = √(48/8) = √6 ≈ 2.45 rad/s.
3. Calculate the damping ratio:
The damping ratio (ζ), which characterizes the degree of damping, is given by:
ζ = b/(2√(mk)) = 24/(2√(8*48)) = 1/√2 ≈ 0.707
4. Determine the actual frequency of the damped oscillations:
Since the damping ratio is less than 1 (ζ < 1), the system is underdamped, meaning it will oscillate with a decreasing amplitude.
The frequency of the damped oscillations (ω_d) is given by:
ω_d = ω_0 √(1 - ζ^2) ≈ 2.45 √(1 - 0.707^2) ≈ 1.73 rad/s
Therefore, the frequency of the damped oscillations is approximately 1.73 rad/s.
Method 2 :-
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| The Equation Of A Damped Harmonic Oscillation Is Given By 8(d2y/dt2) +24(dx/dt) + 48y =0. Find The Frequency Of The Damped Oscillations. |
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