Radiation Sound Field Reconstruction Based on Modal Superposition Method and Experiment

Location identification of radiation sound source is the most effective and direct means to improve the stealth of the underwater weapons. Sound radiation modal and sound field distribution can reflect the radiation characteristics of the sound source. In this study, radiation sound field reconstruction of a simply supported panel was conducted based on the modal superposition method. According to the free vibration differential equation of the simply supported panel, the natural frequencies and vibration differential modal function were obtained, and the radiation sound field of the simply supported panel was acquired by using the sound modal superposition method. Then, a radiation sound field reconstruction experiment was conducted based on the near-field acoustic holography(NAH) sound field reconstruction model, and the radiation characteristics of the simply supported panel reconstruction surface were obtained. Experimental results were compared with the theoretical value. The reconstructed sound pressure is consistent with the theoretical one, which verifies the effectiveness of the proposed radiation sound field reconstruction method based on modal superposition method.