CAJ | 학술논문

为分析舰船各部位辐射噪声源分布情况,采用近场聚焦波束扫描声图被动定位法,对测量区内各个位置进行逐点波束扫描,根据各点波束输出功率绘制噪声源的分布图.提出近场波束零陷形成方法,在强辐射声源位置形成波束指向性零点,减少其对其他部位波束扫描的影响.仿真结果表明:该方法提高了对弱声源信号的检测和定位能力,改善了聚焦波束扫描声图质量.
위분석함선각부위복사조성원분포정황,채용근장취초파속소묘성도피동정위법,대측량구내각개위치진행축점파속소묘,근거각점파속수출공솔회제조성원적분포도.제출근장파속령함형성방법,재강복사성원위치형성파속지향성영점,감소기대기타부위파속소묘적영향.방진결과표명:해방법제고료대약성원신호적검측화정위능력,개선료취초파속소묘성도질량.
To analyze the distribution of ship-radiated noise sources,near field focus beam-forming method was used, which could scan the measured area point-by-point and describe the distribution map of noise sources by the power output of beam-forming. A beam null-forming method of near field was given to form a beam zero in which the strong noise sources could be suppressed, and the influences caused by above noise sources in measured area would be less. Simulation results show that the proposed method can improve the quality of the focus beam-forming acoustic image and the ability of weak targets detection and location.