【作者】 马建敏； 陈天宁； 黄协清；

【Author】 Ma Jianmin;Chen Tianning;Huang Xieqing;

【机构】 西安理工大学； 西安交通大学；

【摘要】 用大型有限元结构分析软件ANSYS计算得到的单元速度值,根据结构振动声辐射理论,对金属旋转锯切噪声进行了定量预估。从理论预估值与现场锯切噪声实测结果的比较可见,本文所建立的金属锯切噪声分析及预估理论是正确的。针对金属旋转锯切噪声大,工作环境恶劣,一般控制方法难于实施的特点,提出了对主要发生体锯片进行振动和噪声控制的一系列措施。首次把金属橡胶和金属纤维材料,粉体阻尼技术和喷水阻尼技术用于对旋转锯切过程的减振降噪。各种控制方案经模型锯机试验,取得了明显的降噪效果。更多还原

【Abstract】 With resorting to the large-scale finite element analysis software ANSYS,the speed response values of saw blade and workpiece are obtained under the action of sawtooth periodic pulses.And then,the quantitative prediction of radiation sound power of saw blade and workpiece is made in accordance with structural sound radiation theory.As compared with the practically-measured results on the site,the theoretical predicting values are found in good agreement with the practically-measured results.According to characteristics of metal revolute cutting noise control hard,a series of measures to control vibration and noise of saw blade are put forward.It is the first time to use metal rubber and metal fibre materials,powder damping technique and water spray damping technique in reducing the vibration and lowering the noise in the process of revolute cutting with the obvious results obtained.更多还原