FIELD: test equipment.
SUBSTANCE: invention relates to testing equipment. Method involves additional plates with vibration isolated objects fixed thereon arrangement on the base, and adjusting the recording equipment, and two identical on-board compressors for the compressed air production on board of the aircraft installation on the base. At that, installing one compressor on the standard rubber vibration isolators, and installing the other compressor on the investigated two-mass vibration isolation system, which includes rubber vibration isolators and elastic-damping intermediate plate with vibration isolators, for example in the form of polyurethane plates, which, like the compressor standard rubber vibration isolators, are installed on the rigid bulkhead, which is installed on the base through the vibration damping pad. On the rigid bulkhead, between the compressors, a vibration sensor is fixed, the signal from which is directed to an amplifier and the recording equipment, for example an octave spectrometer operating within the frequency band (Hz): 2; 4; 8; 16; 31.5; 63; 125; 250; 500; 1,000; 2,000; 4,000; 8,000, and then the obtained amplitude-frequency characteristics of operation of each of the compressors are compared and conclusions on vibration isolation efficiency of each system, where they are installed, are made. To determine each of the vibration isolation systems under investigation natural frequencies, performing the impact pulsed loads on each of the systems simulation and recording the free oscillations oscillograms, decoding of which shows intrinsic frequencies of system and logarithmic decrement of oscillation damping of each of investigated two-mass vibration isolation system.
EFFECT: technical result is expansion of technological capabilities of testing objects having several flexible links with aircraft structural parts.
1 cl, 4 dwg
