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为了得到微穿孔组合夹芯板的吸声性能与极限承载力,根据声学的有关知识和结构的基本原理[1],对组合板进行分析,用混响室法进行试验测量,同时应用统计能量软件AuToSEA对这一新型板材的吸声性能进行分析,试验结果和统计能量分析的结果吻合良好,两者均说明微穿孔夹芯板具有较大吸声系数,吸声效果很好,并取得同时具有CMA和CNAL资质的测试数据。用有限元理论,分析厚度分别为50、80、100mm的微穿孔组合夹芯板在正向加载和反向加载情况下的抗弯承载力及弯曲变形,分析其受力变形机理,提出剪力分配系数这一概念,从而对最终设计公式进行了修正,并将修正承载力公式计算结果与有限元分析结果和简支梁公式计算结果相比较,验证了修正公式的可行性,给出微穿孔组合夹芯板的承载力设计公式及相关参数。
In order to obtain the sound absorption performance and the ultimate bearing capacity of the micro perforated composite sandwich panel, according to the basic principle of acoustic knowledge and structure [1], the composite panel is analyzed and the reverberation chamber method is used for the experimental measurement. At the same time, the statistical energy The software AuToSEA analyzes the sound absorption performance of this new type of plate. The experimental results are in good agreement with the results of statistical energy analysis. Both of them show that micro-perforated sandwich panels have large sound absorption coefficient and sound absorption effect is good. Test data with CMA and CNAL qualifications. The finite element method was used to analyze the flexural capacity and bending deformation of micro-perforated composite sandwich panels with thickness of 50, 80 and 100 mm respectively under forward loading and reverse loading. The mechanical deformation mechanism was analyzed and the shear force The distribution coefficient of the concept, so that the final design formula was amended, and the correction of bearing capacity formula and the results of finite element analysis and simple beam calculation results compared to verify the feasibility of the amendment formula, given the micro-perforation Bearing Capacity Design Formula and Related Parameters of Combined Sandwich Panels.