METHOD FOR DYNAMIC TESTING OF STRUCTURES AND SYSTEMS FOR MECHANICAL AND ELECTRONIC EFFECTS Russian patent published in 2023 - IPC G01M7/00 

FIELD: testing.

SUBSTANCE: invention relates to a method for dynamic testing of structures and systems for mechanical and electronic effects and can be used for dynamic testing of various mechanical structures and electronic equipment for dynamic mechanical, electromagnetic and other dynamic effects in order to determine the reliability thereof during operation. Method consists in loading the equipment with preset random broadband vibration, shock, and harmonic loads, wherein the object is tested in the combined mode, the first stage thereof involving determining the resonant frequencies of the object over the entire standardised frequency range, followed by setting frequency ranges wherein the broadband random vibration is replaced with equivalent periodic harmonic vibration and corresponding measurements are taken in the process of testing. After the initial test signal value is set and in order to identify dangerous deviations of the parameters of the object undetectable by known testing methods in the process of testing, first, the voltage m of harmonics in the testing frequency range from the first output of the harmonics unit is applied to the input of the test object, and the voltage amplitudes of the harmonics from the second output of the harmonics unit are received at the input of the first quad splitter and the first input of the second multiplier, as well as the first input of the complex transmission coefficient computation unit of the test object, wherein the voltage amplitudes of the harmonics are received at the second input thereof from the output of the test object, and the first output of the complex transmission coefficient unit, containing the result of computation of the cosines of phases thereof, is connected to the third input of the second multiplier, and the second output of the complex transmission coefficient computation module is connected to the second input of the second multiplier and the input of the second quad splitter, the output whereof is connected to the input of the first adder, and the output of the first quad splitter is connected to the input of the second adder, the output whereof is connected to the first input of the first multiplier, wherein the output of the first adder is connected to the second input thereof, and the output of the first multiplier is linked with the input of the square root computation unit, the output whereof is linked with the first input of the divider unit, and the output of the second multiplier is linked with the input of the third adder, the output whereof is linked with the second input of the divider unit, wherein a numerical factor whereby the value of the preset test input signal applied to the input of the test object is multiplied is formed at the output thereof, and the test results are measured at the point of recording the response signal of the system or structure.

EFFECT: possibility of determining the maximum possible potential reaction of the test object to a load satisfying the limit capabilities of the object in real operating conditions using an additionally measured phase-frequency characteristic of the object, as well as calculating the test signal value ensuring the maximum possible reaction of the object to said test signal.

1 cl, 6 dwg