飞机壁板结构隔声计算与实验研究

THE COMPUTATIONAL AND EXPERIMENTAL INVESTIGATION ON SOUND INSULATION OF AIRCRAFT SIDEWALL STRUCTURES

研究了典型飞机壁板结构的隔声特性。在透射系数的计算中,考虑了飞行隔框、长桁对蒙皮刚度的影响,从而对透射系数中的刚度项进行了修正。对两种结构形式的壁板做了对比隔声实验与理论计算,计算结果与实验数据基本吻合。文中给出飞机隔声设计的一些参考性准则。

In theis paper, the characteristics of sound insulation of a typical aicraft sidewall structure have been investigated. The influence of the frames and stringers on the bending rigidity of the aircraft sidewall skin has been taken into account in computation of sound transmission coefficient and the stiffness term in sound transmission loss has been revised. The sound insulation computations and experiments of two types of sindewall structures, with and without the add-on accoustic treatments respectively, have been carried out, The theoretical results agree with the measured results on the whole. Some reference principles for the sound insulation design of aircraft cabin are presented in this paper.