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首页> 外文期刊>European Journal of Glass Science and Technology, PartA. Glass Technology >Experimental and simulation studies on acoustical characterisation of laminated safety glass
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Experimental and simulation studies on acoustical characterisation of laminated safety glass

机译：层压安全玻璃声学特征的实验与仿真研究

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摘要

Frequently, the deviation of attention of an automobile driver due to excessive noise is among the major factors responsible for accidents and at 54.3 dB the sound between 500 to 5000 Hz is the highest noise transmitted to the driver through glass.((1)) Thus, there is a strong requirement for the inclusion of acoustical measures while selecting the windshield of cars. The present work includes acoustical properties measurement of laminated glass (LG) having polyvinyl butyral (PVB) and ethyl vinyl acetate (EVA) interlayers of different critical thicknesses using ASTM E1050-98 (sound absorption testing using impedance tube), ASTM C423 (sound absorption testing using scale rooms) and also by a newly conceived method. The experimentation results validated the FE developed using COMSOL. An algorithm developed by the authors based on a conjugate gradient optimization method with an aid of a transfer matrix approach is utilised for estimating the acoustical properties of LG plate. The statistical analysis is performed to establish the dependency on frequency, interlayer type and thickness on sound absorption and also for ensuring that the errors in experimental results are acceptable. It is found that increasing the interlayer thickness reduces the transmitted noise level for both LG-PVB and LG-EVA. LG-EVA with 1.52 mm interlayer having the highest sound absorption whereas LG-PVB with 0.38 mm interlayer transmits the maximum noise. An increase in the frequency of sound results in an increment in the sound absorption.
机译：通常，由于过度噪声引起的汽车驾驶员注意的偏差是负责事故的主要因素，并且在54.3dB处，500到5000 Hz之间的声音是通过玻璃传输到驾驶员的最高噪声。（（1））因此，在选择汽车挡风玻璃时纳入声学措施的强有力要求。本作本作包括使用ASTM E1050-98（使用阻抗管的声音吸收测试），ASTM C423（声音吸收使用比例室进行测试）以及通过新构思的方法。实验结果验证了使用COMSOL开发的FE。基于转移矩阵方法的基于共轭梯度优化方法的作者开发的算法用于估计LG板的声学特性。进行统计分析以建立对吸声频率，层间类型和厚度的依赖性，以及确保实验结果中的误差是可接受的。发现增加中间层厚度降低了LG-PVB和LG-EVA的传输噪声水平。 LG-EVA具有1.52毫米的中间层，具有最高的吸声，而具有0.38mm的中间层的LG-PVB透射最大噪声。声音频率的增加导致声音吸收中的增量。

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