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| Design optimization of vibration response for range hood’s shell |
Yu Hu1;Hou hong1; Yang Dai2 |
| 1. Northwestern Polytechnical University, Xi’an, 710072, China;
2. Ford Motor Company, Detroit, USA |
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Abstract For the purpose of reducing noise from the vibration of range hood’s shell, the
vibration response of it is calculated based on the finite element model of range hood’s shell when
excited by the motor. Then, the optimal geometric design of the structure is preformed using the
peak particle velocity at four sensitive nodes as the objective function during which the
thicknesses of the four parts are adopted as the designing variable. In addition, the weight of the
structure is kept no more than its original weight. The particle velocity is calculated by using the
commercial software Nastran and the DOE method is utilized to obtain the optimized shell
thickness. After which, the particle velocity peak of the designed area is decreased more or less
and a maximum 8.2 dB reduction of vibration velocity level can be obtained. Results show that the
changes of the four part’s thicknesses can reduce the radiating noise of the range hood at the
condition of no increase of the shell’s weight.
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Received: 23 July 2010
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Corresponding Authors:
Yu Hu
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2011, Vol. 30 
