Acoustic properties of materials for vibration reduction and resistance on ultra-precision machine

作者：Huang Dan; Wang Ying

来源：Key Engineering Materials, 2014, 620: 140-145.

DOI：10.4028/www.scientific.net/KEM.620.140

• Acoustic absorption coefficients
• Acoustic resistance
• Analysis and calculations
• Incompressible fluid
• Ultra-precision machines
• Ultraprecision machining
• Vibration reduction materials
• Vibration reductions

The porous ceramic holds good potential as acoustic resistance and vibration reduction material during ultra-precision machining. Porous materials absorb acoustic energy by friction with the air that moves inside the pores, and in this paper, the motion is simplified as the incompressible fluid in a single cylindrical pore. The analysis and calculation results show that the acoustic coefficient of porous ceramic is a complicated wave function and the acoustic absorption coefficient calculation model is feasible based on fluid thermal viscous theory. The acoustic absorption coefficient of porous ceramic increases with the increase of thickness, and its period and amplitude decreases with the increase of porosity of ceramic.

• 出版日期2014
• 单位Polytechnic university