基于微穿孔板的声学标准件参数设计与优化

发布时间：2018-04-26 01:24

本文选题：微穿孔板 + 吸声系数　；参考：《湖北工业大学》2017年硕士论文

【摘要】：吸声材料吸声特性值的测量工作在不同实验室、不同测量方法下无法统一、不具有可比性,导致吸声材料的质量良莠不一。吸声材料的准确测量是评价其质量的重要保障,为了改善吸声材料测量值的准确可靠性,需建立声学标准样板、标准测量方法、被测材料的量值溯源途径,实现对吸声材料声学特性进行标准的量化评价。论文的主要研究内容是制备声学标准样板,对于声学标准样板的参数设计,根据声学标准样板的设计要求,选用结构稳定、便于保存、吸声性能良好的微穿孔板进行参数优化设计,分别采用遗传算法和粒子群算法优化声学标准样板,采用传递函数法测量声学标准样板的吸声系数,结果表明声学标准样板的测量值能较好地匹配理论模型。首先,基于微穿孔板理论模型进行参数作用分析,微穿孔板的四个结构参数共同影响着微穿孔板吸声体的吸声性能,理论分析表明为得到高吸收、宽频带的声学标准样板,要全面综合地考虑各个参数的作用。其次,采用粒子群算法和遗传算法对微穿孔板在低频段100~1000Hz和高频段800~5000Hz进行优化,其优化结果达到了制备声学标准样板的设计要求。两种算法的优化结果基本保持一致,相互对比验证了优化的正确性,为声学标准样板的制备在参数设计上提供支持。最后,根据优化结果制备声学标准样板,采用传递函数法测量其声学性能,测量结果表明在低频段和高频段内,声学标准样板的声学性能均能较好地匹配其理论模型,吸声材料的声学性能可以根据理论模型进行预测,制备声学标准样板,建立声学标准样板、标准测量方法、被测材料完整的量值溯源途径。
[Abstract]:The measurement of sound absorption characteristics of sound absorbent materials can not be unified and comparable under different measurement methods in different laboratories, which leads to different quality of sound absorbing materials. The accurate measurement of sound absorbing material is an important guarantee to evaluate its quality. In order to improve the accuracy and reliability of sound absorbing material, it is necessary to establish the acoustic standard template, standard measurement method and traceability of the measured material. The acoustic characteristics of acoustical materials are evaluated quantitatively. The main research content of this paper is to prepare the acoustic standard template. For the parameter design of the acoustic standard template, according to the design requirements of the acoustic standard template, the structure is chosen to be stable and easy to preserve. The microperforated plate with good sound absorption performance is optimized for parameter design. Genetic algorithm and particle swarm optimization algorithm are used to optimize the acoustic standard template, and the transfer function method is used to measure the sound absorption coefficient of the acoustic standard template. The results show that the measured values of the acoustic standard template can well match the theoretical model. First of all, based on the theoretical model of microperforated plate, the four structural parameters of microperforated plate affect the sound absorption performance of microperforated plate. The theoretical analysis shows that the acoustic standard template with high absorption and wide band can be obtained. The function of each parameter should be considered comprehensively and synthetically. Secondly, particle swarm optimization (PSO) and genetic algorithm (GA) are used to optimize microperforated plate in low frequency 100~1000Hz and high frequency 800~5000Hz. The optimization results of the two algorithms are basically consistent, and the correctness of the optimization is verified by the comparison between the two algorithms, which provides support for the preparation of the acoustic standard template in parameter design. Finally, the acoustic standard template is prepared according to the optimized results, and its acoustic performance is measured by the transfer function method. The measurement results show that the acoustic performance of the acoustic standard template can match its theoretical model well in the low frequency and high frequency bands. The acoustic properties of acoustical materials can be predicted according to the theoretical model, the acoustic standard templates can be prepared, the acoustic standard templates, the standard measurement methods and the complete traceability of the measured materials can be established.
【学位授予单位】：湖北工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP18;O42

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