非接触式超声马达的声流及声压分析  

Acoustic Streaming and Pressure Analysis of Non-Contact Ultrasonic Motor

作　　者：邹楠[1] 魏守水[1] 姜春香[1] 

机构地区：[1]山东大学控制科学与工程学院,济南250061

出　　处：《振动．测试与诊断》2008年第4期318-321,共4页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(编号:10572078);山东省自然科学基金资助项目(编号:Y2007A16)

摘　　要：为了分析非接触式超声马达的声流驱动机理及其声压分布,利用边界层理论分析了声流的产生,得出速度流型与边界层厚度、流体厚度的关系,分析了声流在边界层内的作用。运用有限元仿真方法对流体媒质中声场和定子的模态进行计算,通过谐响应分析得出内部声场的声压分布,指出当定子振动时,流体媒质中存在弹性行波。In order to analyze the acoustic streaming driving mechanism and acoustic pressure distribution of a non-contact ultrasonic motor, based on boundary layer theory, the phenomenon of acoustic streaming was discussed. The relationship between the velocity with the boundary layer and liquid thickness was obtained and the acoustic streaming function in boundary layer was analyzed. The finite element analysis of the acoustic field of the liquid inside the stator and the modes of the stator was made in this paper. The stator vibrating characteristics and the acoustic pressure distribution were also gained by harmonic response analysis. The analysis shows that traveling wave exists in the liquid when the stator vibrates. The result of this paper can give guidance in the structure design of the ultrasonic motor.

关 键 词：非接触 边界层 有限元 声压 声流 

分 类 号：TM38[电气工程—电机]