| 赵晓丹,胡鹏,孙平.多层微穿孔板结构声学性能计算方法对比分析[J].,2012,31(3):196-201 |
| 多层微穿孔板结构声学性能计算方法对比分析 |
| The comparative analyses of the calculation methods for absorptivity of multilayer micro-perforated panel absorbers |
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| 中文摘要: |
| 计算多层微穿孔板结构声学特性方法传统主要用声电类比法,目前出现阻抗转移法和传递矩阵法,对比分析这三种计算方法,同时进行相应的实验验证。结果表明:阻抗转移法和传递矩阵法实质上是相同的,这两种方法计算结果与实验结果吻合良好。声电类比法在空腔较大时计算结果偏离实验值,原因是声电类比法采用集总参数分析,计算多层结构时,空腔单元只考虑声顺,忽略声质量,导致误差。阻抗转移法和传递矩阵法不存在这一误差,计算准确。 |
| 英文摘要: |
| The absorptivity of multilayer micro-perforated panel absorber(MPA) usually is estimated by the equivalent circuit(EC).Recently,there are attempts to use the impedance transfer method(ITM) or the transfer matrix method(TMM) to calculate the absorptivity.It is necessary to compare the three methods.The corresponding experiments are carried out for the comparison.Theoretical analysis and experimental results show that the ITM and TMM are the essentially same,and their calculation results are consistent with the experimental data.However,the calculations results using EC disagree with experimental data,especially for the structure with long cavity.EC is a kind of concentrated parameter analysis method.For a multilayer structure,this method only considers acoustic compliance,while ignores the effect of acoustic mass.Thus,it will cause calculation error.This kind of error does not exist in ITM and TMM,thus they are more accurate than EC. |
| DOI：10.11684/j.issn.1000-310X.2012.03.006 |
| 中文关键词: 微穿孔板 阻抗转移 传递矩阵 声电类比 |
| 英文关键词: Micro-perforated panel absorber Impedance transfer Transfer matrix Equivalent circuit |
| 基金项目:江苏大学高级专业人才科研基金项目(11JDG096);江苏高校优势学科建设工程资助项目(苏政办发〔2011〕6号);江苏省动力机械清洁能源与应用重点实验室开放基金项目(QK09008)资助 |
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