Optimal Design for the Rear-Glass Joint of an Automobile for Squeak and Rattle Noise Reduction
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Ever since vehicle noise, vibration, and harshness (NVH) reduction technology made dramatic improvements, vehicle interior noises represented by Squeak and Rattle (S/R) becomes an ever more important factor to improve the emotional quality of vehicles. Generally, people detect S/R noises on automotive interior parts, brake system, suspension, Body in White (BIW), etc. Among them, the rear-glass joint is a major source for vehicle interior noise, and can cause S/R noises under a variety of environmental and driving conditions. This study uses, two approaches, experimental and numerical approaches, to define the cause of S/R noise at the rear-glass section. Based on these two approaches, this study confirms that S/R noises generate through the contact between bottom side of molding and BIW. The sealant penetration length, panelmolding distance, and sealant width are the parameters affecting noise generation. In addition, this study created an optimal design with Design of Experiments (DOE) of the rear-glass joint. The design maximized the sealant penetration length, which is a parameter that majorly affects noise. The optimal design comprises of two steps: sealant injections shape optimization and rear-glass joint parameter optimization. Each step is carried out with FEA and validated by sealant penetration experiments. Through these optimizations, this study obtained an optimum combination of design parameters and fignificantly reduced the noise generated by rear-glass section.
Key wordsSqueak Rattle Finite element analysis Risk priority number Rear-glass Sealant
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- Choi, S. B., Kim, K. S., Yang, S. M., Ki, D. S., Choi, S. U., Lee, J. H. and Suh, M. W. (2015). A study on BSR test mode and analytical method. Proc. Spring Conf. Korean Society for Noise and Vibration Engineering, 4, 398–398.Google Scholar
- Chung, S. W., Jung, Y. H., Kim, G. H. and Cho, K. Z. (2002). FE analysis of three dimensional backward extrusion unsing the ALE description. Proc. Spring Conf. Korean Society for Precision Engineering, 5, 628–631.Google Scholar
- Dorkinheimer (2011). https://www.civicx.com/threads/rattling-noises-from-the-rear-end.3451
- Gosavi, S. S. (2005). Automotive Buzz, Squeak and Rattle (BSR) detection and prevention. TATA Technologies Ltd. ARAI Pune, 664–667.Google Scholar
- Hagiwara, I. and Ma, Z. D. (1992). Development of eigen mode and frequency response sensitivity analysis method for coupled acoustic-structural systems. JSME Int. J. 3, 35, 229–235.Google Scholar
- Kim, B. Y. (2012). A Study on the Squeak/Rattle Decision Algorithm for Analysis of Noise Occurrence Mechanism of Automotive Interior Plastic Parts. Ph. D. Dissertation. Sungkyunkwan University. Gyeonggi, Korea.Google Scholar
- Ma, Z. D. and Hagiwara, I. (1992). Sensitivity caculation method for conducting modal frequency response anlysis of coupled acoustic-structural systems. JSME Int. J. 3, 35, 14–21.Google Scholar
- Service Procedure (2011). Windshield Applique Trim Rattle/Buzz-built on or Before. Ford Motor Company. TSB 12–9–3.Google Scholar
- Technical Service Bulletin (2010). Upper/Lower Windshield/Rear Glass Tick Noise. Toyota Motor Company. T-SB-0141–10.Google Scholar
- VDA-230–206 (2007). Examination of the Stick-slip Behavior of Material Pairs, Verband der Automobilindustrie e.V.Google Scholar