Untersuchung des Körperschall- und Abstrahlverhaltens von Getrieben mit der Zielsetzung einer aktive

FKM 1997
Issue No. 224
Project No. 168

Abstract:

Statutory regulations limit the permissible noise emission of technical devices in many areas of application in everyday life. For small and medium-sized enterprises in particular, the demands for cost-effective designs, short development times and high power densities on machines can conflict with the objective of low-noise design. Using the method of experimental structural optimization, this report uses the example of spur gears to demonstrate a possibility for targeted, efficient influencing of structure-borne noise behaviour with the aim of reducing noise. In addition, the possibilities of influencing structure-borne noise and radiation behavior by varying the physical parameters of stiffness, mass and damping are experimentally investigated, discussed and evaluated on a total of 18 gearbox housing variants. The current means of investigation are the experimental modal analysis method on the structure-borne sound side and a frequency range sound intensity measurement method on the airborne sound side. The use of estimation methods and numerical calculation methods is of interest in order to be able to make useful predictions about the structure-borne and airborne sound behavior of newly developed structures at an early design stage. By comparing structure-borne sound measurement data with estimated structure-borne sound measurements, the application possibilities and limitations of the MASAK program for quantitative and qualitative structure-borne sound prediction are explained. On the basis of comparative calculations using the finite element method for the treatment of the structure-borne noise problem and the boundary element method for the airborne noise problem, the current possibilities of using modern numerical methods for the low-noise design of machines are discussed. Scope of report:
133 p., 95 ill., 64 lit. Start of work:
01.07.1992 End of work:
31.09.1995 Funding body:
BMWi I AIF-Nr. 8991 Research unit:
Fachgebiet Maschinenelemente und Maschinenakustik Technische Hochschule Darmstadt Magdalenenstraße 4 64289 Darmstadt Head:
Prof. Dr.-lng. Dr.-lng. E.h. F.G. Kollmann Author:
Dipl.-lng. T.F. Schösser Chairman of the working group:
Dr. rer. nato H. Schmidt Mercedes-Benz AG, Stuttgart Dipl.-Ing. H. Mors MTU, Friedrichshafen Chairman of the advisory board:
Prof. Dr.-lng. H. Kipphan Heidelberger Druckmaschinen AG, Heidelberg