| 顾荣华， 石秀东， 王 斌， 黄 巧， 许金州.基于ANSYS的复合型阶梯变幅杆动态特性研究[J].轻工机械,2017,35(6):37-42 |
| 基于ANSYS的复合型阶梯变幅杆动态特性研究 |
| Dynamic Performance of Composite Stepped Horn Based on ANSYS |
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| DOI：10.3969/j.issn.1005 2895.2017.06.008 |
| 中文关键词: 超声振动系统 圆锥过渡长度 变幅杆 有限元分析 面积比 |
| 英文关键词:ultrasonic vibration system conical transition length horn FEA（finite element analysis） area ratio |
| 基金项目:国家科技支撑计划项目（2015BAF12B00） |
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| 中文摘要: |
| 为了对某复合超声变幅杆进行动态特性研究，基于变幅杆设计理论，利用仿真软件MATLAB和ANSYS对其进行动力学分析。根据复合变幅杆的3个主要设计参数，即面积比、端口直径和圆锥过渡长度，对变幅杆进行有限元仿真试验，记录每组试验的共振频率、放大系数及最大响应应力等动态性能参数进行分析。结果表明：面积比或端口直径越大，有限元得到的共振频率和放大系数越偏离解析值，最大响应应力也越大；圆锥过渡长度越大，有限元得到的共振频率和放大系数越接近解析值，最大响应应力也越小。3个设计参数对变幅杆动态特性都具有显著影响，过大的面积比或端口直径都有可能导致变幅杆失真而无法工作或是最大响应应力超出材料的许用应力导致变幅杆损坏。增大圆锥过渡长度可以减小共振时产生的频率误差和最大响应应力值，但同时会减小放大系数。 |
| 英文摘要: |
| To study on dynamic characteristics of a compound ultrasonic horn and based on the design theory of amplitude bar, the dynamic analysis was carried out by using the simulation software MATLAB and ANSYS. According to the three main design parameters of composite horn, such as area ratio, port diameter and conical transition length, the finite element simulation test of the ultrasonic horn was proceeded. The resonance frequency, the amplification coefficient and the maximum response value of the stress and dynamic performance parameters were recorded and analyzed. The results show that, with the larger of the area ratio, the resonance frequency and the amplification factor of the finite was more deviated from the analytical value, and the biggest response stress value was bigger. With the longer conical transition, the resonance frequency and the amplification factor of the finite was closer with the analytical value, and the biggest response stress value was smaller. The three design parameters had significant influence on the dynamic characteristics of the horn. Too large area ratio or port diameter could cause distortion of the amplitude bar, or the maximum response stress value exceeded the allowable stress of the material. Increasing the taper transition length could reduce the frequency error and the maximum response stress, but it decreased the magnification factor. |
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