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简述了用希尔伯特变换识别结构非线性的原理,并利用这一原理对实际结构的实测敲击传递函数进行了希尔伯特数值分析,研究了不同硬度锤头和不同敲击力幅激励时所产生的非线性,并定义误差函数来反映其非线性的强弱程度。
In this paper, the principle of structural nonlinearity identification by Hilbert transform is briefly described. By using this principle, the Hilbert number of the actual structural percussion transfer function is analyzed, and the influences of different hardness hammers and different percussive force The amplitude of the non-linearity generated when excited and the definition of the error function to reflect the degree of its nonlinearity.