Issue |
E3S Web Conf.
Volume 446, 2023
2nd International Conference on High-Speed Transport Development (HSTD 2023)
|
|
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Article Number | 01005 | |
Number of page(s) | 8 | |
Section | Acoustics, Noise, Vibrations | |
DOI | https://doi.org/10.1051/e3sconf/202344601005 | |
Published online | 10 November 2023 |
Stochastic Mechanism of Shock Disturbances of Rocket Sleigh Supports during High-Speed Track Testing of Aviation Equipment
1 Federal State Enterprise “State State Research and Testing Ground for Aviation Systems named after L.K. Safronov”, Beloozersky, Russia
2 Moscow Aviation Institute (National Research University), Moscow, Russia
* Corresponding author: biryukovvi @mai.ru
Tests of ballistic aircraft on rail tracks in conditions close to real ones are an economically viable alternative to flight tests. Rocket rail tracks exist in the USA, Canada, France, China and a number of other countries. The article con-siders potentially self-oscillating mechanical systems that have a threshold mechanism for the transition from a noise vibrational stable state to a self-oscillatory one, depending on the mode parameters. An algorithm for estimating the damping coefficient of the harmonic components of a particular mode of a complex process is proposed. As an indicator of energy loss of the oscillatory component during resonant interaction, the value of the density of the power spectrum related to the width of the frequency range is taken. Based on the solution of the Fokker-Planck equation for a stochastic process, estimates of the “drift” and “diffusion” coefficients are obtained. A technique for estimating the state of potentially self-oscillatory systems in the form of a set of probabilistic stochastic characteristics is proposed. According to the experimental data of vibration accelerations for the structural elements of the rocket sled with the test object, according to the proposed method, it is possible to make the contribution of the self-oscillations of the elements, if they are pre-sent in a complex vibration process, and also to make estimates of their vibration strength at resonances.
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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