21.2.17. The natural frequencies of small oscillations of a conservative system are n1 = 6 Hz, n2 = 12 Hz. Harmonic frequency of the driving force F is equal to n3 = 15 Hz. whether steady-state amplitude of vibration of the system will increase, if at the same magnitude of force F will increase its frequency to 3 Hz?
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(DYNAMICS, Chapter 21 - Small oscillations of mechanical systems, par - 21.2: The vibrations of systems with two degrees of freedom) from Reshebnik to the collection of short tasks on the theoretical mechanics Kep OE, JA Viba, OP Grapis, JA Svetinysh et al. Publishing Moscow / Graduate School / 1989, 2009, 2012.
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