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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。
Based on the finite element method and the experimental test, the dynamic characteristics of ultrasonic transducer system for casting are studied. With the aid of the ANSYS piezoelectric coupling analysis function, the resonance frequency, mode shape and amplitude of the end face of the ultrasonic transducer system are analyzed. The transient heat conduction simulation was carried out and the temperature distribution within 1 200 s of ultrasonic transducer system was obtained. Based on this, the resonant frequency of ultrasonic transducer system under different temperature fields was obtained. The simulation results are verified by laser vibrometer and casting test. The analysis and test results are of guiding significance for ultrasonic transducer system optimization and frequency tracking function design.