FIELD: testing equipment.
SUBSTANCE: additional plates with vibration-insulated objects attached to them are placed on the base, and recording equipment is adjusted, and two identical on-board compressors are mounted to obtain compressed air on board the aircraft. One compressor is mounted on standard rubber vibration insulators and another compressor is mounted on the examined dual-mass vibration insulation system, consisting of rubber vibration insulators and an elastically damping intermediate plate with vibration insulators, for example, in the form of plates made of polyurethane, which are placed on the rigid bulkhead mounted on the base through the vibration cushioning gasket, as well as the standard rubber vibration insulators. A vibratory sensor is mounted on the rigid bulkhead, between the compressors, a signal from the vibratory sensor is sent to the amplifier and recording equipment, such as octave spectrometer, operating in the frequency band (Hz): 2; 4; 8; 16; 31.5; 63; 125; 250; 500; 1000; 2000; 4000; 8000 Hz, and then the obtained amplitude-frequency operation characteristics of each compressor are compared. Then the conclusions about the effectiveness of vibration insulation of each system on which they are mounted are drawn, and in order to determine the natural frequencies of each of the examined vibration insulation systems, imitation of shock pulse loads on each of the systems is carried out and oscillograms of free vibrations are recorded, while interpreting which natural frequencies of the system and an oscillation damping constant in each of the examined dual-mass vibration insulation systems are assessed.
EFFECT: expanded technological capabilities of testing the objects having several elastic couplings with the body parts of the flying object.
4 dwg
