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第 38 卷 第 3 期                                                                       Vol. 38, No. 3
             2019 年 5 月                          Journal of Applied Acoustics                      May, 2019

             ⋄ 研究报告 ⋄



                   复合材料机身结构声学特性及影响参数分析






                                              胡 莹     †   李晨曦 林 森


                                             (中国商飞上海飞机设计研究院        上海   201210)

                摘要    针对复合材料 (以下简称 “复材”) 结构进行声振分析，通过无限大障板理论和波动方程，分析复材平板
                和曲板结构的传声损失，并利用统计能量法分析壁板的隔声性能，与文献中的实验结果进行对比，验证建模的
                有效性。然后将复合材料机身结构等效成一个复材圆柱壳体结构，分析不同参数，包括压差、曲率半径、长度、
                铺层角度、纤维材料、加筋等对结构隔声性能的影响。最后与金属机身结构进行隔声性能对比，发现：在环频率
                与吻合效应频率之间，金属机身结构的传声损失明显大于复材机身结构，而在吻合效应频率以上频段，由于复
                材结构的吻合效应频率向低频移动，其传声损失好于金属机身结构。
                关键词     复材结构，隔声性能，传声损失，统计能量分析
                中图法分类号: TB53           文献标识码: A          文章编号: 1000-310X(2019)03-0333-12
                DOI: 10.11684/j.issn.1000-310X.2019.03.007





               Acoustic characteristics and effective factor analysis of the composite fuselage



                                              HU Ying LI Chenxi LIN Sen


                              (Comac Shanghai Aircraft Design and Research Institute, Shanghai 201210, China)

                 Abstract  The infinite panel theory and the wave equation have been applied to analyze the transmission
                 loss of the composite material structures, including the flat and curve structures. The statistic energy analysis
                 (SEA) is used to model a composite panel, and the simulated results are validated by test data. Then the
                 composite fuselage would be equivalent to a cylinder shell modeled by SEA, and the effects of the pressurized
                 difference, curve radius, shell length, layer angle, fiber material, and reinforcement have been analyzed to this
                 composite fuselage. Lastly, the sound insulation performance of the composite fuselage has been compared to
                 that of the metal fuselage. The results show that the transmission loss of the latter is better than the former
                 between the range of the ring frequency and coincidence frequency, but it will show an opposite phenomenon
                 above the coincidence frequency, because the coincidence frequency of the former has a shift to the low frequency
                 compared to the latter.
                 Key words Composite structure, Sound insulation, Transmission loss, Statistic energy analysis







             2018-09-14 收稿; 2019-03-08 定稿
             作者简介: 胡莹 (1983- ), 女, 安徽池州人, 博士, 高级工程师, 研究方向: 舱内声学设计。
             † 通讯作者 E-mail: huying2@comac.cc
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