SELF |
54 |
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S.B. Karavashkin, O.N.
Karavashkina |
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For the
first subsystem (i = 1) the amplitude varies from F0 / s
g at g to infinity at g
0. For all the following subsystems (i
> 1) this variation takes place in limits from infinity to infinity with the minimum at |
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(14) |
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It
means, with the growing subsystem number, the value g min at which the minimal amplitude is achieved
increases. Skudrzyk indicated the resonance peaks bifurcation in complex vibrant systems: Due to damping, some resonances seem single, but if we cool the
studied specimen to diminish the damping, then two maximums are clearly seen
[1, p.244]. He explained this phenomenon so: If two resonance
frequencies are closely spaced and the shape parameters of natural frequencies are
opposite in sign, then the transfer impedance of homogeneous systems nearby some of their
resonances can resemble the bound circuits. In this case the frequency regularity is alike
the band filter characteristic [1, p.323]. However, as the exact analytical
solutions show, the reason of resonance peaks bifurcation are the complex aperiodical
regime features, not the circuits connectivity. Note additionally that the complex
aperiodical regime existence is new in our knowledge of elastic systems vibration. In
simple elastic lines without resonance subsystems this regime is impossible. And as we
said in the introduction, complex systems have been currently studied not so well to
reveal this regime. Summing
up the aforesaid, we see that the system of solutions (9) (12) completely describes
the vibration pattern in all the range. Thus we have achieved the aim of this item. 3. Analysis of
obtained solutions and comparison with experimental results To
analyse the obtained solutions, conveniently use the following concept of an elastic line
transfer function |
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(15) |
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and of the input resistance
which in case of external force action on the start of line is equal to |
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(16) |
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We can
easy determine from (9) (12) that for the studied model |
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(17) |
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(18) |
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