Figure below shows an aircraft fighter. The wing of the aircraft may be modelled as a clamped wing with two lump masses at its centre and tip. The two masses represent the mass of the wing and the missiles. The equivalent model shown in the figure is used to estimate the first two natural frequencies of the wing and therefore the fuselage can be assumed rigid. 24EI If m1 = am, m2 = bm and bending stiffnesses of the beams are k where a = 6.3005 and b = 13 %3D 5.2174 and if w1 and w2 are the first and second natural frequencies of the system, w2/w1 is: x, (t) x2(t) EI m, EI (m,) 1/2 1/2 3.4053 4.9188 2.5225 1.3621 1.8414

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Figure below shows an aircraft fighter. The wing of the aircraft may be modelled as a clamped wing with
two lump masses at its centre and tip. The two masses represent the mass of the wing and the missiles.
The equivalent model shown in the figure is used to estimate the first two natural frequencies of the
wing and therefore the fuselage can be assumed rigid.
24EI
If m1 = am, m2 = bm and bending stiffnesses of the beams are k
where a = 6.3005 and b =
13
%3D
5.2174 and if w1 and w2 are the first and second natural frequencies of the system, w2/w1 is:
x, (t)
x2(t)
EI
m,
EI
(m,)
1/2
1/2
3.4053
4.9188
2.5225
1.3621
1.8414
Transcribed Image Text:Figure below shows an aircraft fighter. The wing of the aircraft may be modelled as a clamped wing with two lump masses at its centre and tip. The two masses represent the mass of the wing and the missiles. The equivalent model shown in the figure is used to estimate the first two natural frequencies of the wing and therefore the fuselage can be assumed rigid. 24EI If m1 = am, m2 = bm and bending stiffnesses of the beams are k where a = 6.3005 and b = 13 %3D 5.2174 and if w1 and w2 are the first and second natural frequencies of the system, w2/w1 is: x, (t) x2(t) EI m, EI (m,) 1/2 1/2 3.4053 4.9188 2.5225 1.3621 1.8414
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