Using hybrid FE-SEA method analyzed the vibration and sound radiation performance when the reinforcing ribs and damping material were applied to flat panel, under unit force excitation and sound radiation excitation respectively. The power balance equations of two subsystems were derivated according to the Statistical Energy Analysis (SEA) method, and the changing of loss factor in the influence of energy transmission between the SEA subsystems was studied. The hybrid FE-SEA prediction model of a passenger car was established, and the reliability of the model was verified by experiment. The car body panels’ vibration and sound radiation performance were compared and the changing trend of driver head cavity's sound pressure level was predicted, when use three different schemes to add damping material.
Key words
sound radiation performance /
reinforcing rib /
noise reduction with damping /
hybrid FE - SEA model /
prediction and analysis
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References
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