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| NVH analysis and improvement of a vehicle body structure using DOE method
Shahram Azadi/Mohammad Azadi/Farshad Zahedi
The Journal of Mechanical Science and Technology, vol. 23, no. 11, pp.2980-2989, 2009
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.
Keyword : Vehicle body; FEM; DOE method; Modal analysis; Frequency map; NVH; RSM |
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TEL: +82-2-501-3605, E-mail: editorial@j-mst.org |
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