FIELD: test equipment.
SUBSTANCE: invention relates to equipment for testing instruments for vibration and impact effects. Device comprises a base on which a rigid bulkhead with a vibration level sensor is fixed, on which two identical objects are installed on different systems of their vibration isolation and their amplitude-frequency characteristics are measured. Rigid bulkhead is fixed on the base through a vibration damping gasket, on which two identical objects are inspected, for example, aircraft airborne compressors, while one compressor is installed on the regular rubber vibration isolators, and the other compressor – on the investigated two-mass system of vibration isolation, including rubber vibration isolators and an elastic-damping intermediate plate with vibration isolators, for example, in the form of polyurethane plates. At the same time, a vibration level sensor is attached to the rigid bulkhead, which is connected to an amplifier and a spectrometer to record the amplitude-frequency characteristics of the vibration isolation system being studied, and in order to determine the natural frequencies of each of the vibration isolation systems under investigation, shock impulse loads are imitated on each of the systems and oscillograms of free oscillations are recorded, while determining the logarithmic coefficient of attenuation δ1 oscillatory system.
EFFECT: technical result is expansion of technological capabilities of testing objects having several flexible links with aircraft structural parts.
3 cl, 6 dwg
