This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Thought and Reasoning Behind Developing SAE J1637 - Vibration Damping Test Method
Annotation ability available
Sector:
Language:
English
Abstract
The paper discusses the importance of a well documented standardized laboratory test procedure to evaluate damping material performance for the automotive industry, and to understand the parameters that influence the precision of the test method. The standard outlines a methodology which was developed with the general consensus of automotive engineers, suppliers, and independent test laboratories. The methodology is based on the Oberst bar test method where a damping material is bonded to a specific size steel bar and the system is excited at its various modes of vibration under a cantilevered configuration. The damping performance is expressed in terms of composite loss factor, ηc, within the frequency range of approximately 100 Hz to 1000 Hz, and over the useful range of temperatures for the given application. The paper reviews the results of round-robin tests that were conducted at ten different laboratories, and discusses various precautions that need to be taken to obtain valid data. The paper also discusses the variability of the round-robin test results within a laboratory (repeatability) as well as that of between laboratories (reproducibility). Finally, the paper discusses ways to evaluate the consistency of the data and to detect unusual values which affect the precision of the test method.
Recommended Content
Authors
Citation
Saha, P. and Chahine, J., "The Thought and Reasoning Behind Developing SAE J1637 - Vibration Damping Test Method," SAE Technical Paper 931320, 1993, https://doi.org/10.4271/931320.Also In
References
- Apps D. C. Automobile Noise “Handbook of Noise Control” Harris Cyril M. McGraw-Hill Book Company 1957
- Tsuge K. Kanamaru K. Kido T. Masuda N. “A Study of Noise in Vehicle Passenger Compartment during Acceleration” Proceedings of 1985 SAE Surface Vehicle Noise and Vibration Conference P-161, Paper No. 850965 27 34
- Tomkin D. W. “Unconstrained Layer Damping and the Use of Modified PVA as a High Efficiency Lightweight Material” Proceedings of 1985 SAE Surface Vehicle Noise and Vibration Conference Paper No. 850968 53 59
- Chahine J. Saha P. “Rationale for a Standardized Vibration Damping Test Procedure for Automotive Applications” SAE Technical Paper No. 920406 International Congress & Exposition Detroit, Michigan February 24-28, 1992
- American Society for Testing Material (ASTM) Designation E756 “Standard Method for Measuring Vibration - Damping Properties of Materials”
- American Society for Testing Material (ASTM) Designation E691 “Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method”