|

Calculated-Experimental Determination of Values Natural Frequencies Oscillations of the Case and Parameters of the Case Determining these Values

Authors: Proskurin A.V., Shlishevskiy A.V. Published: 21.12.2019
Published in issue: #6(129)/2019  

DOI: 10.18698/0236-3941-2019-6-89-104

 
Category: Mechanical Engineering and Machine Science | Chapter: Machines, Units and Processes  
Keywords: natural frequency of oscillations, form of natural oscillations, shock loading, spectral density, experimental studies, piezoelectric accelerometer

The task of studying the behavior of various structures under the influence of intense pulsed (shock) loads that arise during the operation of many modern structures, machines and devices remains relevant for many years. One of the stages of this study is to find the values of the natural frequencies of vibrations and design parameters that determine these values. To find the natural frequencies of oscillations of the body, which are four flanges connected by cylindrical shells, the finite element method and analytical solutions were used. An analysis of experimental studies. Determination of natural frequencies values and design parameters determining these values will allow evaluating the response of the structure to the loads acting during its operation, and making corrections to the structure that change the response of the structure, as well as will help to more accurately select the installation sites of piezoelectric accelerometers for recording drums accelerations

References

[1] Yaushev A.A., Taranenko P.A., Zhestkov A.V., et al. Computational and experimental study of frequencies and natural mode of welded shell of coriolis flowmeter. Vestnik YuUrGU. Seriya "Matematika. Mekhanika. Fizika" [Bulletin of the South Ural State University, series "Mathematics. Mechanics. Physics"], 2018, vol. 10, no. 1, pp. 45--51 (in Russ.). DOI: 10.14529/mmph180106

[2] Ponomarev I.S., Makhnovich S.V., Pantileev A.S. Peculiarities of experimental determination of frequencies and shapes of eigenmodes of cylindrical shells. Nauchnyy vestnik NGTU [Science Bulletin of the NSTU], 2016, vol. 64, no. 3, pp. 44--58 (in Russ.). DOI: 10.17212/1814-1196-2016-3-44-58

[3] Ryabov A.V., Katanosov A.E., Trubaev A.I., et al. Computational and experimental investigations of the dynamic characteristics of the blades of the model Kaplan turbine. Problemy mashinostroeniya [Journal of Mechanical Engineering], 2014, vol. 17, no. 1, pp. 21--26 (in Russ.).

[4] Mezhin V.S., Obukhov V.V. The practice of using modal tests to verify finite element models of rocket and space hardware. Kosmicheskaya tekhnika i tekhnologiya [Space Technique and Technologies], 2014, no. 1, pp. 86--91 (in Russ.).

[5] Proskurin A.V. Vosproizvedenie udarnykh uskoreniy v laboratornykh usloviyakh [Laboratory reproduction of shock accelerations]. Snezhinsk, RFYaTs-VNIITF Publ., 2017.

[6] Gokhfel’d D.A., Getsov L.B., Kononov K.M., et al. Mekhanicheskie svoystva staley i splavov pri nestatsionarnom nagruzhenii [Mechanical properties of steels and alloys under non-stationary loading]. Ekaterinburg, UrO RAS Publ., 1996.

[7] PNAE G-7-002--86. Normy rascheta na prochnost’ oborudovaniya i truboprovodov atomnykh energeticheskikh ustanovok. Gosatomenergonadzor SSSR [Norms for stress calculation of the equipment and pipelines for atomic power stations. USSR State Atomic Power Supervision]. Moscow, Energoizdat Publ., 1989.

[8] Pisarenko G.S., Yakovlev A.P., Matveev V.V. Spravochnik po soprotivleniyu materialov [Handbook on strength of materials]. Kiev, Naukova dumka Publ., 1975.

[9] Zakharov Z.P., red. Fiziko-mekhanicheskie svoystva konstruktsionnykh materialov i nekotorye sovremennye metody ikh issledovaniya [Physical-mechanical properties of constructional materials and some modern methods of their research]. Moscow, TsNIIatominform Publ., 1982.

[10] APM Structure3D. Rukovodstvo pol’zovatelya. Sistema rascheta i proektirovaniya detaley i konstruktsiy metodom konechnykh elementov. Versiya 16 [APM Structure 3D. User manual. System for calculation an engineering of parts and constructions using finite elements method. Version 16]. Korolev, NTTs Avtomatizirovannoe Proektirovanie Mashin Publ., 2018.

[11] Timoshenko S.P., Young D.H., Weaver W. Vibration problems in engineering. Van Nost. Reinhold, 1955.

[12] Filippov A.P. Kolebaniya mekhanicheskikh system [Oscillations of mechanical systems]. Kiev, Naukova dumka Publ., 1965.

[13] Skubachevskiy G.S. Aviatsionnye gazoturbinnye dvigateli. Konstruktsiya i raschet detaley [Aviation gas-turbine engines. Parts construction and calculation]. Moscow, Mashinostroenie Publ., 1969.

[14] Biderman V.L. Teoriya mekhanicheskikh kolebaniy [Theory of mechanical oscillations]. Moscow, Vysshaya shkola Publ., 1980.

[15] Smith S.W. The scientist & engineer’s guide to digital signal processing. California Technical Publ., 1997.