The significance of cross-order terms in interface mobilities for structure-borne sound source characterization

• Applicant: Professor Dr. Björn A.T. Petersson
• Subject Area: Mechanics
• Term: from 2005 to 2010
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 16195423

The lack of a widely accepted approach for structure-borne sound source characterization in contrast to air-borne and liquid-borne sound sources causes substantial problems in a vast majority of cases in engineering practice. Planning and low-noise design especially at early design stages is severely hampered, thereby effectively preventing lead-time reductions. Thus, a top priority research task is the development of a proper method for the characterization of vibrational sources which would provide the engineer with absolute source data and physical insight. For this task, the approach employing the concept of interface mobilities appears most suitable. Due to the inherent complexity of structure-borne sound sources and the associated transmission process, simplifications are both desirable and necessary. In this proposal, the significance of cross-order terms of such interface mobilities will be investigated with a view towards a physically underpinned, simplified method for the characterization of vibrational sources. A clarification of the physical admissibility to neglect the cross-order terms of the interface mobilities would greatly contribute to the understanding of the transmission process and constructively pave the way for a development of a practically satisfactory approach for source characterization.

• DFG Programme: Research Grants