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本文运用模态分析方法系统分析了飞机壁板附加动力吸振器前后的结构振动特性,推导出了动力吸振器减振降噪量公式,并对动力吸振器各参数以及安装位置对其减振降噪效果的影响进行了分析和讨论.在此基础上设计了适合于飞机壁板安装的动力吸振器,并进行了实验室实验和飞机飞行试验.结果表明,动力吸振器用于抑制飞机壁板的振动与声辐射具有良好的前景.
In this paper, the modal analysis method is used to systematically analyze the structural vibration characteristics before and after the addition of the dynamic vibration absorber on the aircraft siding. The formula of the vibration and noise reduction of the dynamic vibration absorber is deduced, and the vibration reduction and vibration reduction of the dynamic vibration absorber, Noise effect is analyzed and discussed.On this basis, a dynamic vibration absorber suitable for the installation of aircraft siding is designed, and laboratory experiments and aircraft flight tests are carried out.The results show that the dynamic vibration absorber is used to restrain the aircraft siding Vibration and sound radiation have good prospects.