中国机械工程2017，Vol.28Issue(3)：272-278,7.DOI:10.3969/j.issn.1004-132X.2017.03.004
旋转锯片空气动力学噪声特性计算与分析
Calculations and Analyseis on Aerodynamic Noise Characteristics of Rotating Saw Blades
摘要
Abstract
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.关键词
锯片/多场耦合/振动/噪声/预估Key words
circular saw/multi field coupling/vibration/noise/prediction分类
信息技术与安全科学引用本文复制引用
田永军,段国林,夏晓光,张萼..旋转锯片空气动力学噪声特性计算与分析[J].中国机械工程,2017,28(3):272-278,7.基金项目
天津市自然科学基金重点资助项目(11JCZDJC23100) （11JCZDJC23100）
河北省自然科学基金资助项目(F2014202241) （F2014202241）
