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本文提出用敲击激振法代替传统电磁激振器正弦慢扫频激振技术测试直升机旋翼玻璃钢桨叶动力特性参数,以简化测试设备,缩短测试时间,提高测试精度。文中介绍了敲击激振、FFT导纳频响数据处理的模态分析技术的原理和方法,以及在试验分析中采取的措施和经验,最后给出Y—2直升机玻璃钢桨叶的试验分析结果及其在检验修改有限元动力分析模型中的应用,
In this paper, the dynamic characteristic parameters of helicopter rotor FRP blades are tested by using the method of percussive excitation instead of the traditional electromagnetic exciter sine slow sweep excitation to simplify the test equipment, shorten the test time and improve the test accuracy. In this paper, the principle and method of modal analysis technique of percussive excitation and FFT admittance frequency response data processing are introduced, as well as the measures and experiences in the experimental analysis. Finally, the experimental analysis results of Y-2 helicopter FRP blades And its application in the test and revision of finite element dynamic analysis model,