Calculation and experimental study of the dynamic characteristics of the spacecraft telescope frame mockup
Автор: Igolkin A.A., Safin A.I., Kuznetsov A.V.
Журнал: Siberian Aerospace Journal @vestnik-sibsau-en
Рубрика: Informatics, computer technology and management
Статья в выпуске: 4 vol.25, 2024 года.
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The article presents a computational and experimental study of the dynamic characteristics of a spacecraft telescope frame mock-up. The main attention is paid to the methodology of vibrodynamic tests using a three-component laser vibrometer and the creation of a finite element model of the mock-up under study. To analyze the dynamics of the structure, the main criteria such as modal parameters, model validation and harmonic analysis are defined. Particular attention is paid to the effect of experimental data transformation on the accuracy of calculating the modal assurance criterion. The research investigates telescope frame mock-up, which is a truss structure fixed on springs. The tests were carried out by applying a random impact of the “white noise” type. The dynamic characteristics of the structure were obtained, including the natural frequency of oscillations, which was 93.7 Hz. The experimental data were compared with the results of finite element modeling, which showed a significant discrepancy between them, especially in the area of natural frequencies. This indicates the need to adjust the finite element model. Various criteria for assessing the compliance of calculated and experimental models are considered, such as the coordinate modal assurance criterion (COMAC), the modal assurance criterion (MAC), the cross signature assurance criterion (CSAC) and the cross signature scale factor (CSF). These criteria help to assess the degree of coincidence of vibration modes and frequency characteristics. An analysis of the effect of transforming experimental data into different units of measurement on the results of calculating these criteria is carried out. It is concluded that the current calculation model requires revision and clarification of parameters to achieve better compliance with reality.
Modal parameters, finite element model, validation, harmonic analysis, criterion of model reliability, amplitude-frequency characteristic
Короткий адрес: https://sciup.org/148329755
IDR: 148329755 | DOI: 10.31772/2712-8970-2024-25-4-423-432
Список литературы Calculation and experimental study of the dynamic characteristics of the spacecraft telescope frame mockup
- Anisimov A. V., Vvedensky N. Yu., Likhoded A. I. et al. [On the assessment of the mechanical resource consumption of the structure of the Russian segment of the International Space Station]. Kosmonavtika i raketostroyeniye. 2011, No. 1 (62), P. 74–79 (In Russ.).
- Komarov I. S. [Ground-based experimental testing of rocket and space technology products for impact effects from pyrotechnics]. Trudy MAI. 2013, No. 71 (In Russ.). Available at: https:// trudymai.ru/upload/iblock/a18/a181f426004cc5762b6e7e87795eb545.pdf?lang=en&issue=71 (assec-ced: 05.09.2024).
- Khatuntseva O. N., Shuvalova A. M. [On additional multi-scale similarity criteria for experimental testing of aerospace products]. Vestnik Moskov. aviats. in-ta. 2023, Vol. 30, No. 1, P. 91–97. DOI: 10.34759/vst-2023-1-91-97 (In Russ.).
- Zakharov S. A., Kuzoro V. I., Testoyedov N. A., Khalimanovich V. I. [Features of ground-based experimental testing of large-sized solar batteries]. Naukoyёmkiye tekhnologii.. 2016, Vol. 17, No. 7, P. 22–28 (In Russ.).
- Vvedensky N. Yu., Pustobaev M. V. [Analysis of testing space technology for mechanical impacts in the US, EU and RF]. Voprosy elektromekhaniki. 2012, Vol. 130, P. 19–26 (In Russ.).
- Bezmozgiy I. M., Sofinsky A. N., Chernyagin A. G. [Modeling in problems of vibration strength of rocket and space technology structures]. Kosmicheskaya tekhnika i tekhnologii. 2014, No. 3 (6), P. 71–80 (In Russ.).
- Mezhin V. S., Obukhov V. V. [Comparative analysis of methods for experimental confirmation of finite element models of spacecraft designs]. Kosmicheskaya tekhnika i tekhnologii. 2016, No. 4 (15), P. 14–23 (In Russ.).
- Balyakov D. F. Verification of finite-element model spacecraft via test results. Siberian Journal of Science and Technology. 2018, Vol. 19, No. 1, P. 8–16 (In Russ.).
- Lieven N. A. J., Waters T. P. The application of high-density measurements to dynamic finite element reconciliation. Proceedings of IMAC 13. 1995, P. 185–192.
- Igolkin A. A., Safin A. I., Makaryants G. M. et al. [Noncontact registration and analysis of the product machine vibration with a three-component laser scanner]. Prikladnaya fizika. 2013, No. 4, P. 49–53 (In Russ.).
- Allemang R., Brown D. A correlation coefficient for modal vector analysis. 1st International Modal Analysis Conference. Orlando, USA, 1984.
- Dascotte E., Strobbe J. Updating Finite Element Models Using FRF Correlation Functions. Proceedings of the 17th IMAC Conference. Kissimmee, Florida, 1999, P. 1169–1174.
- Heylen W. et al. Modal analysis theory and testing. 2010, 319 p.
- Guillaume P., Verboven P., Vanlanduit S. et al. A poly-reference implementation of the leastsquares complex frequency-domain estimator. Proceedings of IMAC 21, the International Modal Analysis Conference. Kissimmee (FL), USA, February 2003.
- Pintelon R. et al. Parametric Identification of Transfer Functions in the Frequency Domain – a Survey. IEEE Trans. Autom. Control. 1994, Vol. AC-39, No. 11, P. 2245–2260.
