Simulation analysis method for harmonic distortion of loudspeaker

The invention discloses a simulation analysis method for harmonic distortion of a loudspeaker. The method comprises the following steps: (1) determining small signal parameters of the loudspeaker; (2) simulating a nonlinear driving force coefficient, a nonlinear inductance coefficient and a nonlinear stiffness coefficient of the loudspeaker; (3) establishing a lumped parameter equivalent circuit model of the loudspeaker, and calculating the vibration speed time domain response of the loudspeaker; (4) establishing a finite element or boundary element numerical simulation analysis model of the loudspeaker radiation sound field; (5) transiently solving a wave equation in the sound field based on a finite element or boundary element numerical algorithm so as to simulate and obtain a sound pressure time domain response at any point in the sound field; and (6) performing spectral analysis on the stable region of the sound pressure time domain response, and further calculating to obtain harmonic distortion of the lo