Analysis of the Influence of Acoustic Holographic Measurement Frame on Near-field Spacetime Frequency Characteristics
In underwater acoustic holography measurements,the measurement errors caused by measurement frames and other auxiliary equipment are often neglected.In this paper,the effect of adding an acoustic holographic measurement frame around the benchmark model on the accuracy of near-field acoustic scattering measurements is analyzed by means of the finite element method.The effect of incident wave frequency,incident angle and measurement frame material on the measurement error of the near-field acoustic holographic sound field is analyzed by extracting the sound field data from multiple measurement points on the measurement frame of the conformal circular array.It is found that the scattered sound pressure variation measured by adding an acoustic holographic measurement frame in the incident angle interval,where the scattering effect is weaker,is more sensitive;the acoustic data received at the measurement points near the acoustic holographic measurement frame has higher errors and more peaks;the errors caused by measurement frames with higher material characteristic impedance are larger than those caused by frames with lower characteristic impedance.
万方数据
维普
