METHOD FOR SIMULATION OF PARAMETRIC OSCILLATIONS AND APPARATUS FOR IMPLEMENTATION THEREOF (VARIANTS) Russian patent published in 2021 - IPC B06B1/18 

FIELD: testing.

SUBSTANCE: group of inventions relates to means of experimental testing of dynamic stability of multi-stage oscillatory systems loaded with external polyharmonic and polymodal forces, as well as experimental testing of performability of analytical criteria for dynamic stability of such systems. Substance of the invention: the method of simulation of parametric oscillations in mechanical systems consists in creating in a mechanical multi-stage system comprised of oscillatory circuits interconnected in series by elastic connections, wherein the elastic elements included in the oscillatory circuit are made in form of curvilinear elastic bars allowing to realise nonlinear oscillations in circuits and in a mechanical analogue in general. External polymodal and polyharmonic force effects on the moving element of each of the oscillatory circuits constituting a container with bulk material poured therein are realised in each of the oscillatory circuits by installation of direct current electric engines on the circuit containers with disks with imbalances installed on the rotor axes, and the angular rotation rates from the engine rotors are controlled using rheostats built into the power supply system of the engines.

EFFECT: controlling the laws of variation of container mass in each of the oscillatory circuits allows to experimentally simulate such factors affecting the nonlinear nature of dynamic processes as the law of variation of inertial characteristics in each of the oscillatory circuits.

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