This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Performance Attributes for Root Cause Detection of Piston Induced Noise
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 15, 2016 by SAE International in United States
Annotation ability available
Event: 9th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference
Modern powertrain noise investigation in the development process and during trouble shooting is a combination of experiment and simulation. In simulation in recent years main focus was set on model completeness, consideration of all excitation mechanisms and efficient and stabile numerical algorithms. By that the total response of the virtual powertrain is already comparable to the overall noise level of the real powertrain. Actual challenge is to trace back the overall response to its main excitation and noise generating mechanism as well as to their main driving parameters to support the engineer not only in reaching absolute values, but also to derive the root cause of a response or potential problem and to get hints on how to improve the specific behavior. Approaches by parameter sensitivity studies are time consuming and not unambiguous. Target is to develop (performance) attributes, characterizing a specific NV phenomenon, which are extracted from a specific NV response result for a powerunit under operating conditions. The methodology should be applicable for simulation and measurement to allow direct comparison. By understanding the link between the attribute, its driving parameters and the response, the specific NV effect can be analyzed and optimized within its contribution to the overall response. This paper presents such an approach for the piston induced noise of a combustion engine. Methodology is presented for an I4 gasoline engine with different running clearances between piston and liner and two load conditions. Results from simulation are compared to those from experiment.
CitationResch, T., Knaus, O., Thomann, S., and Brandl, S., "Performance Attributes for Root Cause Detection of Piston Induced Noise," SAE Technical Paper 2016-01-1775, 2016, https://doi.org/10.4271/2016-01-1775.
- Resch T. ; Marušić S. , Naritomi T. , Kojima T. Comparison of Simulation and Measurement during NVH Analysis of Engines 21st Danubia-Adria Symposium on Experimental Methods in Solid Mechanics DAS 2004
- Resch T. , Marušić S. , Teichmann H. Vergleich von Messung und Simulation am Verbrennungsmotor während einer NVH Analyse 4. Symposium "Motor- und Aggregateakustik “Haus der Technik e.V. 15. - 16 June 2005 Magdeburg
- Goetchius G. The Seven Immutable Laws of CAE/Test Correlation 2007 http://www.sandv.com/jun07.shtml
- LMS International Cada-X Manuals Rev 3.5.C
- Graf B. , Resch T.1 , Maunz1 C. , Brandl S. , Perera M. , Robinson K. Driveline NVH refinement combining operational mode shape analysis and multi body dynamic simulation AAC (Aachener Acoustic Colloquium) 2012
- Resch T. ; Klarin B. ; Courtois S. Verzahnungsgeräusch unter Berücksichtigung der Interaktion von Motor und Getriebe - eine Untersuchung mittels MBD- und WBT-Simulation VPC (Virtual Powertrain Creation) 14. MTZ-Fachtagung 2012 Esslingen
- LMS International Transfer Path Analysis: the qualification and quantification of vibro-acoustic transfer paths Application Notes 1995
- Kim , S.J. , Lee , S.K. Prediction of interior noise by excitation force of the powertrain based on hybrid transfer path analysis International Journal of Automotive Technology 9 5 2008 577 583
- Acri , A. , Offner , G. , Nijman , E. Numerical Transfer path analysis for structure-borne and air-borne problems in internal combustion engines Proceedings of International Conference on Structural Engineering Dynamics ICEDyn Lagos, Algarve, Portugal 22-24 June 2015
- Herbst H. M. , Offner G. , Priebsch H.H. A generic Simulation Model for Cylinder Kit Vibro Acoustics - Part 1&2: Piston Slap in Mixed Lubrication Regime Salzburg Austria ASME 2003 Paper No: ICES2003-640