Abstract
In order to reduce the hydrodynamic and structural influences on the detection accuracy especially in the very-low-frequency range, some vibration restraint methods are raised, which are the wrapped fairing improvement, the floating body shape improvement and the cable vibration reduction treatment. Through the improvement analysis and experimental comparison, the final treatments are proposed, namely the multilayer wrapped fairing structure with composite materials, the floating body with NACA0024 airfoil section and X-shape tail spoiler, as well as the brush cable. The sea test is carried out to evaluate the vibration restraint effect. Through comparison of the responses to the ocean ambient noise and the direction of arrival (DOA) estimations with the same underwater transmitting transducer, the results indicate that the horizontal floating platform with vibration restraint treatment has obvious flow resisting effect especially in low frequency range and more accurate DOA estimation.
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Foundation item: This work is financially supported by the Key Research and Development Plan (Public) Project of Shandong Province (Grant No. 2019GHY112042) and the International Science and Technology Cooperation Project of Shandong Academy of Sciences (Grant No. 2019GHZD01).
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Wang, Z., Zheng, Y., Mao, Yf. et al. Influence Analysis and Vibration Restraint Solutions Research on the Underwater Acoustic Monitoring System. China Ocean Eng 34, 718–729 (2020). https://doi.org/10.1007/s13344-020-0065-x
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DOI: https://doi.org/10.1007/s13344-020-0065-x