The vibration-power transmission is often applied as a quantity to describe the structure-borne sound transmission in a vibration system and is, therefore, of major interest for machine manufactures. Well-developed theories about power transfer for multi-point coupled systems exist, especially, for structure-borne sound characterization. However, a theoretic analysis of area coupled systems is still a research topic because a direct measurement of vibration-power transmission in the contact interface for such systems is not possible. This paper introduces a strategy to investigate the vibration power transmission in such systems by using a finite element model which is updated by the so-called “model updating technique” based on experimental modal analysis, which is performed by a laser scanning Doppler vibrometer, in opposite to conventionally by accelerometer. The strategy is demonstrated on a simple test assembly and the estimated power transmission is derived.
Numerical and experimental analysis of structure-borne sound transmission in coupled systems
Xiaodong Cao, Stefan-Georg Backhaus, Rudolf Scheidl, Christian Rembe; Numerical and experimental analysis of structure-borne sound transmission in coupled systems. AIP Conf. Proc. 28 June 2016; 1740 (1): 070004. https://doi.org/10.1063/1.4952681
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