MODELING OF VIBROACOUSTIC PROCESSES IN TRANSPORTATION CABINS

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.
Keywords: sound, noise, vibration, vibration isolation, frequency, transport, sound pressure, sound clinging, rigidity of construction, sound field, acoustic screens.