Marine vibrator using electromagnetic acceleration

Abstract

Optimizing the low-frequency performance of the vibrator is an important direction for the development of marine vibrators. In order to solve the problems of high resonance frequency, small low-frequency displacement and difficulty in generating low-frequency signals of marine vibrators, this study proposed a strategy of high-frequency and low-frequency distributed vibration. In the low-frequency part, electromagnetic acceleration is innovatively combined with the vibrator, and the Ansys Maxwell finite element simulation software is used for analysis. In the high-frequency part, the traditional moving coil vibrator structure is used, and experimental verification is carried out in the anechoic tank. The simulation results show that the low-frequency part of the marine vibrator using electromagnetic acceleration can achieve low-frequency vibration, and the vibration is still relatively stable. The experimental results of the anechoic tank show that within the test frequency band, the sound source level generated meets the requirements of seismic exploration for high-frequency vibrators. This study uses the frequency segmentation strategy to improve the overall working efficiency of the vibrator and provides new ideas for the design of marine vibrators.