Abstract
This paper explores the feasibility of estimating the interior noise of a vehicle compartment when the attachment stiffness (i.e., the local stiffness of the mounting point at which operational force is applied) is altered. In order to change the local stiffness of the vehicle body, it was assumed that the local stiffness could be changed by attaching some additional systems to the vehicle body. The frequency response function (FRF)-based synthesis method is used herein to estimate the change in the local stiffness of the modified vehicle body. In addition, the change in the noise transfer function (NTF) can also be estimated using this method. Since the operational force transmitted from the source excitation to the body attachment is required to predict the interior noise of the vehicle body in the operational condition, a transfer path analysis (TPA) technique was performed. Various vehicles and additional systems were utilized to estimate the dynamic properties of the modified vehicle body. Results indicated that the synthesis technique is an appropriate method to estimate the change in the local stiffness and NTF of the modified vehicle body. The results also show that the interior noise of the body can be estimated accurately by using the synthesis technique and TPA procedure when the vehicle body is locally modified.
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This paper was recommended for publication in revised form by Associate Editor Seockhyun Kim
Kyu-Sik Kim received Ph. D. degree from Seoul National University in 2009. After his Ph. D., He continued to work as a Postdoctoral Research Associate at BK21 School for Creative Engineering Design of Next Generation Mechanical and Aerospace Systems, Seoul National University until 2010. Dr. Kim is currently a researcher at Korea Automotive Technology Institute in Cheonan, Korea. Dr. Kim’s research interests are in the area of FRF based synthesis method, joint parameter identification and model updating of automotive systems.
Yeon June Kang received his B.S. and M.S. degrees in Mechanical Design and Production Engineering from Seoul National University in 1988 and 1990, respectively. He then went on to receive a Ph.D. degree in Acoustics and Vibration from School of Mechanical Engineering, Purdue University in 1994. After his Ph.D., he continued to work as a Postdoctoral Research Associate at Ray W. Herrick Laboratories, Purdue University until 1996. Since 1997, Dr. Kang is working at the Department of Mechanical and Aerospace Engineering, Seoul National University. Dr. Kang’s research interests are in the area of acoustical materials, noise and vibration in automotive engineering, and Korean Bells.
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Kim, KS., Kang, Y.J. Local stiffness control for reducing vehicle interior noise by using FRF-based synthesis method. J Mech Sci Technol 25, 81–88 (2011). https://doi.org/10.1007/s12206-010-1017-9
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DOI: https://doi.org/10.1007/s12206-010-1017-9