多层复合材料隔声特性研究

发布时间：2018-06-23 11:50

本文选题：复合结构 + 轻质　；参考：《太原科技大学》2013年硕士论文

【摘要】：随着科学与技术的不断发展,信息安全问题也日益为人们所担忧,信息安全所涉及的问题关乎个人、集体,社会、甚至是国家安全与社会稳定。在信息安全中的物理防护领域,针对保密会议、保密办公、保密信息处理的专门设施,国家专门出台相关的电磁防护标准,其中对保密会议室的要求尤为苛刻,从距离防御到声、光、电综合防护提出要求。其中声音作为最为基本的信息载体,对声音进行防护是保障信息安全的重点,也是进行信息防护的首要工作。而墙体作为声防护的主要形式之一,传统的墙体隔声已经不能满足现代信息安全的需要,主要表现在以下两个方面:一是隔声量不能满足相关要求;二是不具备其他防护措施——电磁防护和光防护。作者所提出的墙体是以金属板为基底的复合结构墙体,能有效地弥补传统隔墙存在的不足。本文主要围绕以保密会议室的信息安全为背景,建筑结构的轻质墙体为研究对象,综合考虑信息安全存在的各种影响因素,对保密会议室信息安全防护中的声防护进行研究。结合保密会议室的防护要求,本文通过对目前使用的传统轻质隔墙的结构以及隔声性能进行分析,针对高性能声防护要求,在前人的研究和实践的基础上设计了以金属板为基底的多层复合结构,三个基底结构和五个基底模型,分别从单层到多层,到完整结构“质量-弹簧-质量”模型,分析模型中结构的作用以及其中材料的选择和材料的声学功能,并给出三维结构示意图。作者还通过隔声理论对结构模型进行分析,在传统的单双层结构的理论基础上,利用Sharp理论对多层结构的隔声量进行初步预测分析,并按照理论结构模型在实验室中建立实际构件并进行测试。根据相关隔声测试理论与测试标准对建立的实际构件测试完成后,所得出的检测数据与理论测试数据进行对比,理论公式预测所得结果与实际测试数据趋势基本一致,可以较好的反应结构的隔声性能;通过不同结构的隔声频率特性曲线中各个中心频带隔声性能的分析,结果表明,阻尼结构可以很好的削弱共振和吻合效应造成的隔声量下降现象,且带有约束阻尼结构的模型隔声性能优于自由阻尼结构的模型;分别对比了相同材料不同结构和相同结构不同材料构件的隔声性能。由多种复合材料组成的复合结构具有较高的隔声量,五种模型的隔声量都在50d B以上,且结构厚度在100mm左右,其中结构中厚度最薄的为96.7mm,隔声量达54d B;与传统轻质隔声墙体进行对比,隔声量高,且厚度要大大小于传统结构,在应用中具有很好的优势。综合本文对多层复合材料组成的结构的研究,发现该复合结构不仅具备保密会议室相关的电磁防护功能,且满足相应声防护高隔声需求;该结构模型具有较高的实际应用价值,对以后的金属板复合结构的隔声研究也有一定的参考价值。
[Abstract]:With the development of science and technology, the problem of information security is increasingly concerned by people. The problem of information security concerns individual, collective, society, even national security and social stability. In the field of physical protection in the field of information security, for the special facilities for confidential meetings, confidential offices, and confidential information processing, the state has specially issued relevant electromagnetic protection standards, among which the requirements for confidential conference rooms are particularly stringent. From distance defense to sound, light, and electricity comprehensive protection requirements. As the most basic information carrier, sound protection is not only the focus of information security, but also the primary work of information protection. The wall as one of the main forms of sound protection, the traditional wall sound insulation can no longer meet the needs of modern information security, mainly in the following two aspects: first, the sound insulation can not meet the relevant requirements; Second, there are no other protective measures-electromagnetic protection and light protection. The wall proposed by the author is a composite structure wall based on a metal plate, which can effectively compensate for the shortcomings of the traditional partition wall. In this paper, the information security of the conference room is taken as the background, the lightweight wall of the building structure is taken as the research object, and the sound protection in the information security protection of the confidential conference room is studied synthetically considering the various influencing factors of the information security. Combined with the protection requirements of the secret conference room, this paper analyzes the structure and sound insulation performance of the traditional lightweight partition wall used at present, aiming at the high performance sound protection requirements. On the basis of previous research and practice, a multilayer composite structure based on metal plate is designed, three substrates and five basement models are designed, from single layer to multilayer, to complete structure "mass-spring-mass" model. The function of the structure in the model, the selection of materials and the acoustic function of the material are analyzed, and the three dimensional structure diagram is given. On the basis of the traditional theory of single and double layer structure, the sound insulation of multilayer structure is preliminarily predicted by Sharp theory. According to the theoretical structure model, the actual components are established and tested in the laboratory. According to the relevant sound insulation test theory and test standard, the test data obtained are compared with the theoretical test data, and the predicted results are basically consistent with the actual test data trend. The sound insulation performance of the reaction structure can be better, and the analysis of the sound insulation performance of each center frequency band in the different structure frequency characteristic curve shows that, Damping structure can weaken the phenomenon of sound insulation drop caused by resonance and coincidence effect, and the sound insulation performance of the model with constrained damping structure is better than that of free damping structure. The sound insulation properties of the same materials with different structures and the same structure with different materials were compared respectively. The composite structure composed of many kinds of composite materials has high sound insulation. The sound insulation of the five models is above 50 dB, and the thickness of the structure is about 100mm. The thinnest of the structure is 96.7mm, and the sound insulation is 54dB. Compared with the traditional lightweight wall, the sound insulation is high and the thickness is much smaller than that of the traditional structure, so it has a good advantage in application. In this paper, the structure of multilayer composite material is studied. It is found that the composite structure not only has the electromagnetic protection function related to the secret conference room, but also meets the need of high sound insulation for the corresponding acoustic protection, and the structure model has high practical application value. It also has certain reference value to the sound insulation research of metal plate composite structure in the future.
【学位授予单位】：太原科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU552

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