Article

Estimation of power input and output of structures using structural intensity measurements

* Presenting author
Day / Time: 21.03.2018, 14:00-14:20
Room: MW 1250
Typ: Vortrag (strukturierte Sitzung)
Abstract: The numerical determination of energetic quantities gets more important in design modification analysis. Various studies accompany this process by concerning themselves with the measurement of energetic quantities and the comparison of the measurement results with those analytical or numerical calculations.The structural intensity (STI) is used for the analysis of structure-borne sound in order to gain information about the energy flow. The STI creates a link between the excitation of a structure and its sound radiation. Calculating the STI’s divergence enables the identification of energy sinks and sources on a structure. Furthermore, it allows for the calculation of power values used to describe the power input and output into certain areas of the structure.This work compares various boundary conditions and their influence on the STI and its divergence calculated from measurement data obtained from a 2-D scanning laser vibrometer. In contrast to earlier studies, the assessment of the quality of the measurements is not primarily based on the comparison of energetic vector fields but on the comparison of power values calculated from measurement data. The purpose of this study is to assess the possibility to gain information on the energy input and output of indirectly excited structural components.