Application of system concept in vibration and noise reduction
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摘要: 尽管吸振、隔振、吸声、隔声等单项减振降噪技术日臻成熟，针对特定频段、特殊环境的振动与噪声控制新措施层出不穷，但仍然无法确保在工程实践中可以取得良好的减振降噪效果。究其原因，未能重点关注船舶结构等实际系统的整体性和关联性特征、缺乏全面的系统工程思维制约了减振降噪技术效用的充分发挥。通过尝试应用系统工程思维指导减振降噪工程实践，顺利完成了某石油管道生产车间环境噪声治理和某型飞机异常噪声故障复原与归零工作。介绍减振降噪工作中部分系统工程的实践经验，提出相关建议，以期促进系统工程思维在船舶减振降噪工作中的进一步深化推广。Abstract: Although certain vibration and noise control technologies are maturing, such as vibration absorption, vibration isolation, sound absorption and sound insulation, and new methods for specific frequency bands or special environments have been proposed unceasingly, there is still no guarantee that practical effective vibration and noise reduction can be obtained. An important constraint for vibration and noise reduction is the lack of a system concept, and the integrity and relevance of such practical systems as ship structure have not obtained enough attention. We have tried to use the system engineering theory in guiding vibration and noise reduction, and have already achieved certain effects. Based on the system concept, the noise control of a petroleum pipeline production workshop has been completed satisfactorily, and the abnormal noise source identification of an airplane has been accomplished successfully. We want to share our experience and suggestions to promote the popularization of the system engineering theory in vibration and noise control.
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Key words:
- vibration and noise reduction /
- acoustic design /
- system engineering /
- way of thinking
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图 1 管道车间主要噪声源及处理措施
Figure 1. Main noise resource and treatment measure in pipe workshop
图 3 悬臂梁弯曲振动响应示例图
Figure 3. The illustration of the flexural vibration response of cantilever beam
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