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Liftgate Structure Optimization to Minimize Contribution to Low Frequency Interior Noise
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2020 by SAE International in United States
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This paper presents the design development of a SUV liftgate with the intention of minimizing low frequency noise. Structure topology optimization techniques were applied both to liftgate and body FEA models to reduce radiated power from the liftgate inner surface. Topology results are interpreted into structural changes to the original liftgate and body design. Favorable results of equivalent radiated power (ERP) performance with reduced cost and mass is shown compared to baseline liftgate and baseline with tuned vibration absorber (TVA). This simulation includes finite element modeling of coupled fluid/structure interaction between the interior air cavity volume and liftgate structure. In addition to ERP minimization, multi-model optimization (MMO) was used on separate models simultaneously to preserve liftgate structural performance for several customer usage load cases.
CitationHamilton, D., Sivakrishna, M., and Gangu, B., "Liftgate Structure Optimization to Minimize Contribution to Low Frequency Interior Noise," SAE Technical Paper 2020-01-1264, 2020, https://doi.org/10.4271/2020-01-1264.
- Hamilton , D. Frequency Domain Considerations in Vehicle Design for Optimal Structural Feel SAE Technical Paper 2000-01-1344 2000 https://doi.org/10.4271/2000-01-1344
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