摘要
圆锯片的振动是金属锯切噪声的主要声源之一。法兰夹紧作用下金属圆锯片结构的横态密集,各阶阻尼比很小,且主要为节直径横态振动引起的声辐射。欲抑制众多的敏感模态应设法增加圆锯片的结构阻尼。基于干摩擦阻尼耗能机理的分层圆锯片能有效地改善锯片的动态特性,可使金属锯切噪声级降低12dB(A)左右。
The vibration of the circular saw plate is a main sound source in the metal sawing noise. The modes of the metal circular saw plate in clamping are very dense, and have little damping. Under the nodal diameter modes the saw plate would radiate very intensive sound. The restraint of these sensitive modes calls for the increase of the damping of circular saw plate structure. Based on the principle of dry friction damping dissipation, the metal laminated circular saw plate can improve effectively the dynamic behavior of the saw plate. Sstisfactory results of reducing the metal sawing noise has been achieved, the effect being about 12 dB(A).
出处
《天津大学学报》
EI
CAS
CSCD
1989年第3期79-85,共7页
Journal of Tianjin University(Science and Technology)
关键词
分层锯片
振型
降噪
金属锯切噪声
circular saw plate vibration, metal sawing noise, laminated saw plate, dynamic behavior, damping dissipation, reducing noise
