摘要
对传统的微穿孔板吸声结构设计方法进行分析，发现其存在近似公式精度不高及相关参数难以确定的问题，这些问题直接导致设计无法进行或得到不符合要求的设计参数。使用泰勒公式将设计过程中的复杂公式近似展开，并对得到的近似公式进行了修正，使其精度得到了提高；对相关公式进行推导，发现微穿孔板吸声结构的半吸收频带宽度与腔深成正比关系，据此，设计时可根据工程中的空间限制条件，首先确定腔深，再计算其他参数，提出了面向工程的微穿孔板吸声结构设计方法。针对某风机噪声，使用面向工程的设计方法设计了微穿孔板结构参数，得到了满足设计要求的吸声系数曲线。工程应用表明，面向工程的微穿孔板吸声结构设计方法更方便，且更准确
Abstract
Traditional design method of micro-perforated panel structure is analyzed, some problems are discovered in the method, include some approximate formulas are not exact and some parameters can not be ascertained. These problems lead directly can’t design or got false parameters of micro-perforated panel structure. Complex formula in the design method was expanded to approximate formulas with Taylor formula, the approximate formulas was amended and it’s precision was improved. Calculate correlative expressions, discovers that the half-absorption band is in direct proportion to cavity depth of micro-perforated panel structure, Base on this relationship, ascertain the cavity depth by spatial restrict firstly, then compute other parameters, engineering-oriented design method of micro-perforated panel structure was proposed. For the noise of a fan, engineering-oriented design method of micro-perforated panel structure was used, got an absorption coefficient curve which can meet the requirements of design. Engineering application shows that engineering-oriented design method of micro-perforated panel structure is more convenient and more exac
关键词
微穿孔板 /
面向工程 /
吸声系数
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Key words
micro-perforated panel /
engineering-oriented /
absorption coefficient
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张德满;李舜酩.
面向工程的微穿孔板吸声结构设计方法[J]. 振动与冲击, 2011, 30(6): 130-133
Zhang De-man;Li Shun-ming.
Engineering-oriented design method of micro-perforated absorber structure structure [J]. Journal of Vibration and Shock, 2011, 30(6): 130-133
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脚注
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