汽车车身钣金加强肋隔声性能实测与计算分析

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摘要研究了汽车车身钣金加强肋隔声性能实测与计算分析，利用SEA方法和FE-SEA方法建立薄板隔声量计算模型，并与测试值进行对比验证。以车身钣金加强肋高度、宽度、加强肋开孔及钣金加强肋布置密度等因素为变量，设计并制造出不同方案的车身钣金加强肋，然后在混响室-全消室中测试了不同方案钣金加强肋隔声量。试验结果表明，钣金加强肋宽度增加，隔声量在全频段上增大；在钣金加强肋上开孔，隔声量下降；钣金加强肋布置密度增大，隔声曲线峰值、谷值增多。基于试验与计算对比结果，对汽车车身钣金加强肋隔声量计算影响因素进行了分析。

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	袁忠湘1
	Subhash Rakheja1
	肖毅1
	谢新星2
	上官文斌1
	朱钢3

关键词 ：汽车车身钣金加强肋, 隔声量, FE-SEA混合建模, 隔声测试, 隔声计算

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.

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

收稿日期: 2018-08-16 出版日期: 2020-02-28

引用本文:

袁忠湘1，Subhash Rakheja1,肖毅1，谢新星2,上官文斌1,朱钢3. 汽车车身钣金加强肋隔声性能实测与计算分析[J]. 振动与冲击, 2020, 39(5): 227-234.
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. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(5): 227-234.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2020/V39/I5/227

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