Archives of Acoustics, 38, 4, pp. 489–494, 2013

Indicator of Vibroacoustic Energy Propagation as a Selection Criterion of Design Solution

Grzegorz KLEKOT
Faculty of Automotive and Construction Machinery Engineering, Warsaw University of Technology

Contemporary tools which help to design technical objects refer to the conclusions drawn from studying
the changes of physical processes accompanying the exploitation, especially to vibroacoustic processes.
The main problem is to define such vibroacoustic measures, where their changes would model the analyzed
physical phenomena in the best way. Basing on simple indicators which refer to occurring phenomena, it is
possible to obtain accurate solutions with a satisfactory reliance level without using complex computing
techniques needing detailed descriptors. According to the author, the indicators which are based on
the analysis of vibroacoustic energy propagation are very useful in solving engineering problems. These
indicators are useful while diagnosing the condition of technical systems, identifying and minimizing the
vibroacoustic risks. The possibilities of using such indicators in order to find design solution are illustrated
by sample results of the research of the structures with vibroacoustic elements which reduce the noise of
rail vehicles by the rail vibration damping.
Keywords: vibration damping; vibroacoustic energy propagation
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