Consider the double mass/double spring system shown below. -click to expand. Both springs have spring constants k, and both masses have mass m; each spring is subject to a damping force of Ffrictionca' (friction proportional to velocity). We can write the resulting system of second-order DEs as a first-order system, t'(t) = Au(t), with = (₁, ₁, ₂, For values of k= 4, m= 1 and c= 1, the resulting eigenvalues and eigenvectors of A are -0.039-0.248 0.813 A₁,2 -0.53.21, ₁- 0.024 +0.153 -0.502 -0.134-0.3021 0.409 -0.2160.4891 0.661 (a) Find a set of initial displacements (0), 2(0) that will lead to the fast mode of oscillation for this sytem. Assume that the initial velocities will be zero. ((0), ₂(0)) Enter your answer using angle braces, (and). A3,4 -0.5 1.134. = and (b) At what frequency will the masses be oscillating in this mode? Frequency= rad/s

Elements Of Electromagnetics
7th Edition
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Consider the double mass/double spring system shown below.
- click to expand.
Both springs have spring constants k, and both masses have mass m; each spring is subject to a damping force of Ffriction -cz' (friction proportional to velocity).
We can write the resulting system of second-order DEs as a first-order system, t' (t) = Au(t), with = (₁, 21, 22, 2₂) I
For values of k = 4, m = 1 and c = 1, the resulting eigenvalues and eigenvectors of A are
-0.039-0.248i
0.813
A₁2=-0.5±3.2i, v₁ =
0.024 +0.153i
-0.502
-0.134-0.302i
0.409
-0.2160.489
0.661
(a) Find a set of initial displacements (0), 2(0) that will lead to the fast mode of oscillation for this sytem. Assume that the initial velocities wil be zero.
A3,4 -0.5± 1.13i, z =
and
(2₁ (0), ₂(0)) =
Enter your answer using angle braces, (and).
(b) At what frequency will the masses be oscillating in this mode?
Frequency
rad/s
Transcribed Image Text:Consider the double mass/double spring system shown below. - click to expand. Both springs have spring constants k, and both masses have mass m; each spring is subject to a damping force of Ffriction -cz' (friction proportional to velocity). We can write the resulting system of second-order DEs as a first-order system, t' (t) = Au(t), with = (₁, 21, 22, 2₂) I For values of k = 4, m = 1 and c = 1, the resulting eigenvalues and eigenvectors of A are -0.039-0.248i 0.813 A₁2=-0.5±3.2i, v₁ = 0.024 +0.153i -0.502 -0.134-0.302i 0.409 -0.2160.489 0.661 (a) Find a set of initial displacements (0), 2(0) that will lead to the fast mode of oscillation for this sytem. Assume that the initial velocities wil be zero. A3,4 -0.5± 1.13i, z = and (2₁ (0), ₂(0)) = Enter your answer using angle braces, (and). (b) At what frequency will the masses be oscillating in this mode? Frequency rad/s
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