METHOD OF TESTING HONEYCOMB STRUCTURES WITH SHOCK-ABSORBING DEVICES FOR HIGH-INTENSITY IMPACT EFFECTS Russian patent published in 2024 - IPC G01M7/08 G01N3/313 

FIELD: testing.

SUBSTANCE: invention relates to high-intensity impact tests by the method of impact acceleration spectra and can be used for impact testing of structures and equipment in aircraft and aerospace engineering. Method consists in creation of shock effects of high intensity in the form of non-stationary vibration, according to the results of measurements of accelerations of which the required shock spectra of accelerations are formed. When testing cellular structures with shock-absorbing devices, formation of high-intensity impact effects on cellular structures connected by shock-absorbing devices is carried out using pyrotechnic devices. Honeycomb panel, on which the required impact action is created, is replaced with a metal plate while preserving the places and methods of attachment of the shock-absorbing devices. At that, impact actions are created in several stages: first, by single impact action on metal plate between damping devices, then by impact action on damping device, formed as per results of single impact actions. After that, simultaneous blasting of several pyrotechnic devices creates the required impact action both on the metal plate and on the shock-absorbing device. At all stages of impact loading, the power of the pyrotechnic device, the distance between the pyrotechnic device and the metal plate are varied, providing coincidence of the obtained impact spectrum of accelerations with the required spectrum. Thereafter, the next stage is tested, and efficiency of damping devices in cellular structures is evaluated by comparing envelopes of impact acceleration spectra before and after damping devices at all control points.

EFFECT: possibility of creating actions corresponding to real operating conditions of cellular structures with shock absorbers and providing multiple loading of the test object during tests without damages.

1 cl, 9 dwg