加筋位置对铝型材板振动声辐射特性的影响分析
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摘要
以高速列车的内部带三角形空腔的四边固支铝型材外地板为研究对象,采用有限元方法对其进行结构振动特性和声辐射特性研究。重点探究了结构在20 Hz~800 Hz的中低频区域内,不同加筋位置对板结构振动声辐射特性和隔声量的影响。研究结果表明:在中低频范围内,铝型材板加筋后,其辐射声压和声功率能得到很好的抑制效果,在下底板加筋时的抑制效果最为明显,其声学性能最;加筋对铝型材板结构隔声量的影响不明显。
A finite element model of the fixed supported plate is developed,where the triangular cavity is considered,also the vibration and the sound radiation characteristics of this fixed supported plate have been studied. In the range of low and medium frequency( 20 Hz ~ 800 Hz),the effects of different reinforced locations on the acoustic radiation and the sound transmission losses behavior were mainly studied. The numerical results showed that: in the range of low and medium frequency,the reinforced aluminum plate experienced a good inhibitory effects on the radiation and acoustic power characteristics. Furthermore,the most obvious inhibitory effects were found when the reinforced location was at the bottom of the plate,but the inhibitory effects on the sound transmission losses were quite negligible.
A finite element model of the fixed supported plate is developed,where the triangular cavity is considered,also the vibration and the sound radiation characteristics of this fixed supported plate have been studied. In the range of low and medium frequency( 20 Hz ~ 800 Hz),the effects of different reinforced locations on the acoustic radiation and the sound transmission losses behavior were mainly studied. The numerical results showed that: in the range of low and medium frequency,the reinforced aluminum plate experienced a good inhibitory effects on the radiation and acoustic power characteristics. Furthermore,the most obvious inhibitory effects were found when the reinforced location was at the bottom of the plate,but the inhibitory effects on the sound transmission losses were quite negligible.
引文
[1]俞悟周,王晨,毛东兴,等.高速铁路动车组列车的噪声特性[J].环境污染与防治,2009,31(1):71-74.
[2]陆红艳.板结构的振动声辐射及其隔声性能研究[D].武汉:武汉理工大学,2003.
[3]张媛媛.高速列车铝型材外地板结构振动与减振降噪性能分析研究[D].成都:西南交通大学,2013.
[4]张斌.客车车体用铝合金型材阻尼减振降噪效果的分析与研究[D].哈尔滨:哈尔滨工业大学,2008.
[5]沈火明,张玉梅,肖新标,等.高速列车波纹外地板低噪声优化设计[J].交通运输工程学报,2011,11(2):65-71.
[6]赵志高,黄其柏,何锃.基于有限元边界元方法的薄板声辐射分析[J].噪声与振动控制,2008,10(1):39-43.
[7]符俊杰,韩宝坤,鲍怀谦,等.敷设粘弹性阻尼的板的振动与声辐射分析[J].声学技术,2009,28(6):142-144.
[8]康国政,阚前华,张娟.大型有限元程序的原理、结构与使用[M].2版.成都:西南交通大学出版社,2008.
[9]金乃麒,张丰收,张春岩,等.高速列车铝型板振动声辐射特性研究[J].应用数学和力学,2014,35(s1):118-122.
[10]高淑英,沈火明.振动力学[M].北京:中国铁道出版社,2011.
[11]王瑞乾.高速列车地板结构隔声及隔声提高方法探究[D].成都:西南交通大学,2014.
[2]陆红艳.板结构的振动声辐射及其隔声性能研究[D].武汉:武汉理工大学,2003.
[3]张媛媛.高速列车铝型材外地板结构振动与减振降噪性能分析研究[D].成都:西南交通大学,2013.
[4]张斌.客车车体用铝合金型材阻尼减振降噪效果的分析与研究[D].哈尔滨:哈尔滨工业大学,2008.
[5]沈火明,张玉梅,肖新标,等.高速列车波纹外地板低噪声优化设计[J].交通运输工程学报,2011,11(2):65-71.
[6]赵志高,黄其柏,何锃.基于有限元边界元方法的薄板声辐射分析[J].噪声与振动控制,2008,10(1):39-43.
[7]符俊杰,韩宝坤,鲍怀谦,等.敷设粘弹性阻尼的板的振动与声辐射分析[J].声学技术,2009,28(6):142-144.
[8]康国政,阚前华,张娟.大型有限元程序的原理、结构与使用[M].2版.成都:西南交通大学出版社,2008.
[9]金乃麒,张丰收,张春岩,等.高速列车铝型板振动声辐射特性研究[J].应用数学和力学,2014,35(s1):118-122.
[10]高淑英,沈火明.振动力学[M].北京:中国铁道出版社,2011.
[11]王瑞乾.高速列车地板结构隔声及隔声提高方法探究[D].成都:西南交通大学,2014.