MODELING OF VIBROACOUSTIC PROCESSES IN TRANSPORTATION CABINS
DOI:
https://doi.org/10.33042/2522-1809-2022-6-173-178-182Keywords:
sound, noise, vibration, vibration isolation, frequency, transport, sound pressure, sound clinging, rigidity of construction, sound field, acoustic screensAbstract
In the closed rooms of small buildings, and in the cabins of flexible transport vehicles, there is a very specific process of developing both structural and occasional noise. Dzherela noise and vibrations on transport means it is cleverly possible to change on mechanical, aerodynamic, hydro mechanical, electromagnet and inch. Operators of a large number of transport vehicles - emergency and road vehicles, vantage cars, assistance for transporting passengers and others. Noise of 85 - 95 dB A. Vikoristannya traditional and effective, from the point of view of the noise control operator, designs that are not rimmed with rosary do not expect to give results. In some cases, it can lead to a retype і, besides; it is not enough to pay off financial investments.
By the method of cinch doslidzhen є theoretically setting up the noise reduction processes in closed small-volume applications (in the cabins of transport vehicles) with the purpose of entering and using the noise mode on the operator's workstation.
The task of the data is studied in the development of a mathematical model for the analysis of vibroacoustic parameters with the method of development of rational noise protection for operators of transport facilities. The reduction of the noise level at the operator's working station is mainly due to the additional structural elements of the cabin, hoods, screens, and they can include a number of soundproof clay structures in their line of work. Structural noise is transmitted to the cabin due to the vibrations of the walls and cabin sub-logs. Intensity and proportion of the noise to fall due to the structural sound of the connection between the elements of the cabin and the vibrations. The presence of gaps, breaks, and openings also affects the noise mode of operators.
For minds, the use of a small volume with an accuracy sufficient for practice (± 2 dB) equal to the noise in the operator's work area can be developed on the basis of the energy law of sound folding.
References
DSN 3.3.6.037-99. Sanitary standards for environmental noise, ultrasound and infrasound.
DSN 3.3.6.039-99. Sanitary norms of general and local vibration.
Ivanov I. I. Fight against noise and vibrations on track and construction machines. - 2nd ed., revised. – M.: Transport, 1987. 223 p.
Noise reduction by soundproofing methods. V. I. Zaborov, I. V. Gorenstein, L. N. Klyachko and others - M .: Stroyizdat, 1973.
Novak S.M., Logvinets A.S. Noise and vibration protection in construction. K.: Budivelnik, 1990.
Izmerova N. F. Labor hygiene./ Ed. N. F. Izmerova, V. F. Kirillova. - M.: GEOTAR-Media, 2010. - 592 p.
Virobnicha sanitariya: Navch. posib./Tkachuk K.N., Kashtanov S.F.
Ivanov N. I. Engineering acoustics. Theory and practice of noise control: textbook / 3rd ed. revised and additional – M.: Logos, 2013. – 432p.
Ivanov N. I., Nikiforov A. S. Fundamentals of vibroacoustics: Textbook for universities - St. Petersburg: Polytechnic, 2000. -482 p.
Downloads
Published
How to Cite
Issue
Section
License
The authors who publish in this collection agree with the following terms:
• The authors reserve the right to authorship of their work and give the magazine the right to first publish this work under the terms of license CC BY-NC-ND 4.0 (with the Designation of Authorship - Non-Commercial - Without Derivatives 4.0 International), which allows others to freely distribute the published work with a mandatory reference to the authors of the original work and the first publication of the work in this magazine.
• Authors have the right to make independent extra-exclusive work agreements in the form in which they were published by this magazine (for example, posting work in an electronic repository of an institution or publishing as part of a monograph), provided that the link to the first publication of the work in this journal is maintained. .
• Journal policy allows and encourages the publication of manuscripts on the Internet (for example, in institutions' repositories or on personal websites), both before the publication of this manuscript and during its editorial work, as it contributes to the emergence of productive scientific discussion and positively affects the efficiency and dynamics of the citation of the published work (see The Effect of Open Access).
