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| Measurement and calculation for sound insulation performance of automobile body sheet metal reinforcing rib |
| YUAN Zhongxiang1, Subhash Rakheja1, XIAO Yi1, XIE Xinxing2, SHANGGUAN Wenbin1， ZHU Gang3 |
1.School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China;
2.Ningbo Tuopu Group Co., Ltd., Ningbo 315800, China;
3.Ninibo Runzhou Auto Parts Co., Ltd., Ningbo 315800, China |
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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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Received: 16 August 2018
Published: 28 February 2020
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