Suppressing underwater radiated noise (URN) is critical for naval anti-submarine warfare (ASW) survivability. High-heat shipboard cabinets use densely packed cooling fans, but their synchronous operation superimposes harmonic forces, generating a critical structure-borne tonal peak. This study analyzes anechoic chamber data from a 12-fan array, revealing that 2X torque ripples of BLDC motors concentrate within the 125 Hz resonance band of an panel, producing a 50.0 dB peak. To mitigate this, a Differential Speed Dispersion Control (DSDC) is proposed, enforcing a 3% speed deviation among adjacent fans. By inducing phase desynchronization (incoherent addition), an analytical power sum model predicts an 8.5 dB attenuation of the 125 Hz peak. Although accompanied by a minor airborne noise penalty (+0.64 dB), this study analytically validates DSDC as an effective trade-off strategy for maximizing acoustic stealth.

Abstract
1. 서 론
2. 장비 소음 계측
3. 공기/구조전달소음 가진력 분석
    3.1 배경소음 보정 및 공기전달소음 스펙트럼 분석
    3.2 전자기적 조화 기진력 식별
4. 다중 제약 차등 속도 분산제어(DSDC)
    4.1 유량 보존(Flow Volume Conservation)
    4.2 맥놀이 방지(Acoustic Beat Separation)
    4.3 국부 동압 평형 (Dynamic PressureEquilibrium)
5. DSDC 적용 결과 및 실효성 고찰
6. 결 론
References

• 나선근(LIG D&A, Research Engineer) | Sun-Geun Na Corresponding author
• 이석규(LIG D&A, Research Engineer) | Sock-Kyu Lee
• 하성준(LIG D&A, Research Engineer) | Sung-Jun Ha
• 전관수(LIG D&A, Research Engineer) | Kwan-Soo Jeon