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中文摘要：
基于有限元法和试验测试,研究了铸造用超声换能系统动力学特性。借助ANSYS压电耦合分析功能,分析了该超声换能系统常温下的谐振频率、振型及端面输出振幅。进行了瞬态热传导仿真,得到了超声换能系统铸造条件下1 200s内温度分布,在此基础上求得了超声换能系统在不同温度场下的谐振频率。通过激光测振仪及铸造试验对仿真结果进行了验证,分析和试验结果对超声换能系统优化及频率跟踪功能设计具有一定的指导意义。
英文摘要：
The dynamic characteristics of piezoelectric ultrasonic transducer for casting were studied based on finite element method（FEM） and experiments.The vibration mode and displacement distribution were analyzed by ANSYS piezoelectric couple function.The temperature distribution of ultrasonic transducer system under the casting situation in 1 200 s was gained by simulation of transient heat transfer.The resonant frequency of ultrasonic transducer of different temperature distribution was also obtained based on above analysis.The results of simulation are verified by the laser measurement vibrometer and casting experiments,providing some instructions for the design and optimization of ultrasonic transducer.
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