| 蔡晓涛†,沈国良,董佳欢,黄志武,王烨.科考船结构噪声异常定位与控制方法[J].,2024,43(5):991-996 |
| 科考船结构噪声异常定位与控制方法 |
| Location and control method of structural noise anomaly of research ship |
| 投稿时间：2023-05-01 修订日期：2024-09-01 |
| 中文摘要: |
| 针对某科考船在系泊阶段出现的机舱异常结构振动现象，结合实船振动测试数据，通过频域分析方法，进行结构振动源识别与振动传递分析，数据分析结果显示甲板异常振动频率与发电机组机脚频率相同，通过有限元仿真计算出中间质量的固有模态，与发电机组基频、发火频率及其倍频均不吻合，故排除发电机组与中间质量共振导致产生异常振动的可能性，结合上船勘验将结构振动异常故障定位于燃油管系。依据发电机组不同测点的振动频谱特征，得出发电机组的基座振动与燃油管振动存在正相关。因此在后续试验中对该管系进行振动控制，结果表明，燃油管系减振后机舱异常结构振动衰减，发电机组双层隔振装置的隔振效果由20.8dB提升到36.6dB，甲板振动水平也达到理想效果，测试分析与试验结果得到相互验证。 |
| 英文摘要: |
| In view of the abnormal structural vibration phenomenon in the engine room of a research ship during the mooring stage, the frequency domain analysis method was used to identify the structural noise sources and analyze the vibration transmission by combining with the vibration test data of the real ship. The data analysis results showed that the abnormal vibration frequency of the deck was the same as the frequency of the generator foot, and the inherent mode of the intermediate mass was calculated by finite element simulation. It is inconsistent with the fundamental frequency, firing frequency and frequency doubling of the generator set. Therefore, the possibility of abnormal vibration caused by the resonance between the generator set and the intermediate mass is excluded. Combined with the on-board inspection, the abnormal structural vibration fault is located in the fuel oil pipeline system. According to the vibration spectrum characteristics of different measuring points of diesel engine, it is concluded that there is a positive correlation between the base vibration of generator set and the fuel pipe vibration. Therefore, the vibration control of the piping system was carried out in the follow-up test. The results showed that the abnormal structural vibration of the engine room attenuated after the vibration damping of the fuel piping system, the vibration isolation effect of the double-layer vibration isolation device of the generator set was increased from 20.8 dB to 36.6 dB, and the deck vibration level also reached the ideal effect. The test analysis and test results were mutually verified. |
| DOI：10.11684/j.issn.1000-310X.2024.05.008 |
| 中文关键词: 科考船 结构噪声 噪声定位 振动控制 隔振效果 |
| 英文关键词: research ship structural noise noise location vibration control vibration isolation effect |
| 基金项目: |
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