Calculations and analyseis on aerodynamic noise characteristics of rotating saw blades

被引：1
|
作者：
Tian Y. [1 ]
Duan G. [1 ]
Xia X. [1 ]
Zhang E. [1 ]
机构：
[1] School of Mechanical Engineering, Hebei University of Technology, Tianjin
来源：
Zhongguo Jixie Gongcheng | / 3卷 / 272-278期
关键词：
Circular saw; Multi field coupling; Noise; Prediction; Vibration;
D O I：
10.3969/j.issn.1004-132X.2017.03.004
中图分类号：
学科分类号：
摘要：
In order to analyze the acoustic characteristics of the rotary tool under the fluid action, a combined simulation model was constructed based on coupled-field calculation equations. Firstly, the vibration response characteristics of the structure were extracted under the system which contained the rotating saw blades and air flow. Moreover, the vibration responses were regarded as acoustic boundary conditions to calculate acoustic radiation of the circular saw based on the boundary element method. Then, a structure acoustic coupling model was established to calculate the sound pressures. As compared with the experimental results, the coupling model may be used to noise prediction of the rotary tool. The laminar flow may turbulent flow characteristics of blade vibrations were studied in the processes of the rotating saw with around flow field and the sound radiation in time domain characteristics and laminar and turbulent characteristics with the coupled system was studied herein. Then, the characteristics of the directivity of aeroacoustic noise were studied. Finally, the influences of the size structure on the noise of the saw was determined, which provides a method for desining a low noise circular saw. © 2017, China Mechanical Engineering Magazine Office. All right reserved.
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页码：272 / 278
页数：6
相关论文
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