DEVICE FOR SIMULATION OF PARAMETRIC VIBRATIONS Russian patent published in 1997 - IPC

FIELD: experimental check of dynamic stability of leverage systems. SUBSTANCE: parametric vibrations of leverage system are excited by means of gas-dynamic source of disturbing force having periodic component. Source includes exhaust pipe with grids for equalizing the gas flow with gas supply passages connected to it and provided with nozzles at pipe inlet. Flow fluctuation may be ensured through definite geometric parameters of pipe or due to fitting the passages with devices for pulse mode of operation of nozzle. Parameters of leverage system may be regulated by means of masses which are movable along length of its links; masses may be fixed at any required point of link. Mounted at free end of link of leverage system which is nearest to source is spherical obstacle. Links are interconnected by means of flexible hinges. First link is balanced relative to its hinge support by means of two flexible ties: one tie is made if form of spring, force sensor being used as second tie. According to invention, zones of dynamic stability of system may be determined depending on parameters of disturbing force and geometric and physical parameters of leverage system. EFFECT: enhanced efficiency.