摘要
为了提高空气薄膜阻尼结构中低频段隔声性能,提出了采用复合穿孔结构的空气薄膜阻尼结构,即穿孔板空气薄膜阻尼结构。首先,利用有限元统计能量(finite element-statistical energy analysis,FE-SEA)混合法构建了空气薄膜阻尼结构的数值模型,并与实验结果进行了对比,验证了模型的有效性。在此基础上,研究了穿孔板空气薄膜阻尼结构孔的位置、穿孔率、孔径及孔的形状和排布方式等结构参数对其隔声性能的影响。研究结果表明,在附加板上穿孔使空气薄膜阻尼的隔声性能有明显提升,而基板上穿孔其隔声性能改善效果不佳。并且穿孔率和孔径是影响隔声性能的重要因素,而孔的形状和排列对隔声性能影响不大。此结构为中低频段空气薄膜阻尼隔声结构设计提供了依据,具有重要的工程应用价值。
In order to improve the medium and low frequency bands sound insulation performance of the air film damping structure,an air film damping structure with composite perforated structure was proposed,namely the perforated plate air film damping structure.First,a numerical model of the air film damping structure was constructed by finite element-statistical energy analysis(FE-SEA)hybrid method,and the validity of the model was verified by comparing with the experimental results.On this basis,the influence of structural parameters such as the hole location,perforation rate,diameter of holes,and shape and distribution of holes of the perforated air film damping structure on the sound insulation performance of the perforated plate were studied.The results show that the sound insulation performance of air film damping is significantly improved by perforation on the additional plate,while the sound insulation performance of perforation on the substrate is not improved.And the perforation rate and diameter of holes are important factors that affect the sound insulation performance,while the shape and distribution of holes have little effect on the sound insulation performance.This structure provides a basis for the design of air film damping and sound insulation structure in medium and low frequency band,which has important engineering application value.
作者
张超
黑晓涛
廖青
杨光友
周明刚
ZHANG Chao;HEI Xiao-tao;LIAO Qing;YANG Guang-you;ZHOU Ming-gang(Research and Design Institute of Agricultural Machinery Engineering, Hubei University of Technology, Wuhan 430068,China;Hubei Agricultural Machinery Equipment Intelligent Engineering Technology Research Center, Wuhan 430068, China)
出处
《科学技术与工程》
北大核心
2022年第2期511-517,共7页
Science Technology and Engineering
基金
湖北省技术创新专项(2017ABA164)
湖北省自然科学基金(2018CFB281)。
关键词
空气薄膜阻尼
穿孔板
隔声性能
有限元统计能量(FE-SEA)
air film dampimg
perforated plate
sound insulation performance
finite element-statistical energy analysis(FE-SEA)
作者简介
第一作者:张超(1984-),男,汉族,河南驻马店人,博士,讲师,研究方向:振动与噪声控制,E-mail:hbutzc@foxmail.com。
