针对某船舱室振动噪声异常问题进行故障诊断，通过实船测试分析，发现出现异常的主要原因是局部结构共振和风机出风口噪声。基于分析结果和工程实际情况，提出振动噪声优化方案，采用数值仿真方法评估了甲板振动响应的优化效果，利用经验公式估算了舱室内噪声优化效果，进一步开展了实船测试验证。测试结果表明：甲板振动速度由5 mm/s降至1.33 mm/s，符合限值2 mm/s的要求；改造后舱室总声压级为43.4 dB(A)，符合HAB+(MODU)标准45 dB(A)的限值要求，可见振动噪声控制优化方案达到了预期的控制效果。该研究可为船舶舱室异常振动噪声的诊断和识别提供参考，为振动噪声控制方案设计提供技术支撑。
The abnormal vibration and noise problem for a cabin of a ship was diagnosed. Through the analysis of the real ship test, it was found that the main reasons were local structural resonance and fan outlet noise. Based on the analysis results and engineering requirements, the vibration and noise optimization scheme were proposed. Numerical simulation method was used to evaluate the optimization effect of deck vibration response, and empirical equations were used to estimate the optimization effect of interior noise in the cabin. The noise reduction effect was conducted by real ship test. The test results showed that: the deck vibration velocity was reduced from 5mm/s to 1.33 mm/s, which met the limit value of 2 mm/s; the total sound pressure level of the cabin was 43.4 dB(A), which meets the limit value of 45 dB(A) of the HAB+ (MODU) standard, so it could be seen that the vibration and noise control optimization program had achieved the expected control effect. This study could provide reference for the diagnosis and identification of abnormal vibration and noise in ship cabin, and provide technical support for the design of vibration and noise control.
2024,46(23): 1-6 收稿日期：2024-2-1
DOI：10.3404/j.issn.1672-7649.2024.23.001
分类号：TB535+.1；U674.35
作者简介：刘媛(1991-),女,硕士,高级工程师,研究方向为船舶振动噪声控制
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