Abstract
The improvement of a vehicle body structure under the constraint of noise, vibration and harshness (NVH) behavior is investigated by using design of experiments (DOE) method. First, car body geometry is modeled in CATIA and meshed in HYPERMESH software. Then, a modal analysis between 0–50 Hz is done by MSC NASTRAN. A frequency map of the body is extracted and compared with a reference map to identify shortcomings. By using factorial and response surface Methods (RSM), optimization of the NVH performance is accomplished. An algorithm is proposed to improve the car NVH behavior. At last, in order to verify the present algorithm, forced vibration is analyzed under real road inputs for the model before and after improvement.
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This paper was recommended for publication in revised form by Associate Editor Yeon June Kang
Shahram Azadi received his B.S. and M.S. in Mechanical Engineering from Sharif University of Technology, Iran, in 1989 and 1992, respectively. He then received his Ph.D from Amir-Kabir University of Technology in 1999. Dr. Azadi is currently an Assistant Professor at the School of Mechanical Engineering at K.N. Toosi University of Technology in Tehran, Iran. His research interests include dynamics, control and automotive engineering.
Mohammad Azadi received his B.S. in Mechanical Engineering from Shiraz University, Iran, in 2006. He then received his M.S. from K.N. Toosi University of Technology in 2008. He is currently a Ph.D student at Sharif University of Technology. His research interests include NVH, fatigue, Composites (FGMs), Finite Element Method (FEM) and automotive engineering.
Farshad Zahedi received his B.S. in Mechanical Engineering from Islamic Azad University, Iran, in 2006. He is currently an M.S. student at K.N. Toosi University of Technology. His research interests include fatigue, Finite Element Method (FEM), vehicle control and dynamics.
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Azadi, S., Azadi, M. & Zahedi, F. NVH analysis and improvement of a vehicle body structure using DOE method. J Mech Sci Technol 23, 2980–2989 (2009). https://doi.org/10.1007/s12206-009-0909-z
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DOI: https://doi.org/10.1007/s12206-009-0909-z