文献类型：期刊文献

英文题名：Pressure potential and stability analysis in an acoustical noncontact transportation

作者：Li, J.[1];Liu, C. J.[1];Zhang, W. J.[2]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Univ Saskatchewan, Dept Mech Engn, Saskatoon, SK S7N5A9, Canada

年份：2017

卷号：63

期号：1

起止页码：125

外文期刊名：ACOUSTICAL PHYSICS

收录：;EI(收录号：20170803364923);WOS:【SCI-EXPANDED(收录号:WOS:000394351000014)】；

基金：This research was supported in part by the National Natural Science Foundation of China under Grant no. 51305138, the Science and Technology Commission of Shanghai Municipality under Grant no. 13ZR1453300 and Opening Fund of State Key Lab of Digital Manufacturing Equipment and Technology under Grant no. DMETKF2014013.

语种：英文

外文关键词：Stability

摘要：Near field acoustic traveling wave is one of the most popular principles in noncontact manipulations and transportations. The stability behavior is a key factor in the industrial applications of acoustical noncontact transportation. We present here an in-depth analysis of the transportation stability of a planar object levitated in near field acoustic traveling waves. To more accurately describe the pressure distributions on the radiation surface, a 3D nonlinear traveling wave model is presented. A closed form solution is derived based on the pressure potential to quantitatively calculate the restoring forces and moments under small disturbances. The physical explanations of the effects of fluid inertia and the effects of non-uniform pressure distributions are provided in detail. It is found that a vibration rail with tapered cross section provides more stable transportation than a rail with rectangular cross section. The present study sheds light on the issue of quantitative evaluation of stability in acoustic traveling waves and proposes three main factors that influence the stability: (a) vibration shape, (b) pressure distribution and (c) restoring force/moment. It helps to provide a better understanding of the physics behind the near field acoustic transportation and provide useful design and optimization tools for industrial applications.