【摘要】 利用有限元法解析并模拟了具有凸起圆环型压电振子的振动状态，给出了结构参数对振型及共振频率的影响关系，提出了有效振型的概念，测试了实际振型并制作了马达样机。更多还原

【Abstract】 In this paper,the vibration modes are calculated and simulated by FEM,and the relations between the structure dimensions and their frequency are given The concept of the effective vibration mode is provided The prototype of this ultrasonic motor is fabricated,and the vibration modes are measured更多还原