FIELD: test equipment.
SUBSTANCE: invention relates to test equipment, particularly equipment for testing instruments for vibration and impact effects. Test bench comprises a base whereon a rigid bulkhead with a vibration level sensor is fixed, onto which there are two identical analyzed objects on different systems of their vibration isolation, and measured are their amplitude-frequency characteristics. On the base through a vibro-damping gasket a rigid bulkhead is fixed, on which there are two identical analyzed objects, for example, onboard aircraft compressors, herewith one compressor is installed onto standard rubber vibration absorbers, and the other compressor - onto the investigated dual-mass vibration isolation system including rubber vibration insulators and a resiliently damping intermediate plate with vibration absorbers, for example, in the form of plates from polyurethane. Onto the rigid bulkhead there is a sensor of vibration level, which is connected with an amplifier and a spectrometer for recording amplitude-frequency characteristics of the investigated system of vibration isolation. To determine fundamental frequencies of each of the analyzed vibration isolation systems simulated are impact pulse loads on each of the systems and oscillograms of free oscillations are recorded, herewith logarithmic attenuation coefficient δ1 of the oscillating system is determined.
EFFECT: technical result is expansion of technological capabilities of testing objects having several flexible links with the aircraft structural parts.
1 cl, 5 dwg
