Study on shape of noise-reduction holes on diamond circular saw blade based on FEM/BEM
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摘要: 对降噪孔几何参数进行研究,以Φ960 mm的金刚石圆锯片为例,将有限元和边界元方法相结合,分析不同降噪孔形状的金刚石圆锯片的振动情况,以计算得到的振动响应作为边界元模型的边界条件,计算金刚石圆锯片的声场特性,并对比分析不同形状降噪孔金刚石圆锯片的计算结果进。结果表明:圆形、三角形、五边形降噪孔金刚石圆锯片分别在低频段、中频段、高频段范围内降噪表现最好;整体降噪效果最明显的是五边形降噪孔金刚石圆锯片。并且提出了该种圆锯片工作的合理转速为346~378 r/min和430~456 r/min。Abstract: To study the parameters of noise-reduction holes,ϕ960 mm diamond saw blades are selected as examples.Finite element method(FEM)and boundary element method(BEM)are used to analyze the vibration condition of the blades with different noise-reduction holes.The vibration response of FEM are used as the boundary condition of BEM model to calculate the characteristics of sound field and compare the results of saw blades with different noise-reduction holes.The results show that blades with circular holes perform better at low frequency,that those with triangular holes perform better in middle frequency and that those with pentagonal holes perform better at high frequency.It is concluded that blades with pentagonal holes are better considering the entire frequency segment,whose reasonable rotation speed should be 346-378 r/min and 430-456 r/min.
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