Measurement and calculation for sound insulation performance of&nbsp; automobile body sheet metal reinforcing rib

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (5) : 227-234.

Measurement and calculation for sound insulation performance of automobile body sheet metal reinforcing rib

YUAN Zhongxiang1, Subhash Rakheja1, XIAO Yi1, XIE Xinxing2, SHANGGUAN Wenbin1， ZHU Gang3

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Abstract

Measurement and calculation for sound insulation performance of automobile body sheet metal reinforcing rib were studied here.The calculation model for sound transmission loss (STL) of a thin plate was established with SEA and FE-SEA hybrid modeling methods.Its calculation results were compared with test ones for verification.Automobile body sheet metal reinforcing rib’s height, width, hole and arrangement density were taken as variables to design and fabricate different schemes of automobile body sheet metal reinforcing rib.These schemes’ STLs were measured in a reverberation-complete elimination room.The test results showed that with increase in width of sheet metal reinforcing rib, its STL increases within full frequency range; if a hole is opened on a rib, its STL drops; with increase in arrangement density of ribs, peaks and valleys of sound insulation curve increase.Based on contrastive results of tests and calculation, factors affecting STL calculation of automobile body sheet metal reinforcing rib were analyzed.

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automobile body sheet metal reinforcing rib / sound transmission loss / FE-SEA hybrid modeling / sound insulation measurement / sound insulation calculation

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YUAN Zhongxiang1, Subhash Rakheja1, XIAO Yi1, XIE Xinxing2, SHANGGUAN Wenbin1， ZHU Gang3. Measurement and calculation for sound insulation performance of automobile body sheet metal reinforcing rib[J]. Journal of Vibration and Shock, 2020, 39(5): 227-234

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