Influence Analysis and Vibration Restraint Solutions Research on the Underwater Acoustic Monitoring System

作者：WANG Zhen,ZHENG Yi,MAO Yu-feng,HE Chuan-lin,GONG Jin-long,HAO Zong-rui

摘要：In order to reduce the hydrodynamic and structural influences on the detection accuracy especially in the very-lowfrequency 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.

发文机构：Institute of Oceanographic Instrumentation Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology National Engineering and Technological Research Center of Marine Monitoring Equipment

关键词：hydrodynamicinterferencevibrationrestraintFAIRINGDOAestimationcomputationalfluiddynamics

分类号： V26[航空宇航科学与技术—航空宇航制造工程]