| 林书玉.纵-扭复合振动模式指数型复合超声变幅杆的研究[J].,1997,16(5):42-46 |
| 纵-扭复合振动模式指数型复合超声变幅杆的研究 |
| The longitudinal-torsional composite mode ultrasonic sectional exponential horns |
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| 中文摘要: |
| 本文对指数型纵-扭复合振动模式的复合超声变幅杆进行了理论及实验研究，该变幅杆由均匀截面直棒及指数型变截面杆组成．文中推出了变幅杆中纵向振动及扭转振动的共振频率方程，通过改变指数型变截面律的截面变化规律，实现了同一变幅杆中纵向振动与扭转振动的同频共振．对一些指数型复合变幅杆的共振频率进行了测试，结果表明，测试值与理论值基本一致，并且变幅杆中扭转及纵向振动的共振频率测试值也比较符合，从而在理论及实验两方面，实现了复合振动模式超声变幅杆中纵向与扭转振动的同频共振． |
| 英文摘要: |
| The longitudinal-torsional composite mode ultrasonic sectional exponentialhorns are studied. The horn consists of an untapered metal cylinder and an exponentialhorn, these two parts consist of a half wave vibrator. The resonance frequency equationsfor the longitudinsa and torsional vibrations of the sectional horn are derived. By choos-ing the radius decay coefficient of the exponential horn, the simultaneous resonance ofthe longitudinal and torsional vibrations of the horn is realized. Four sectional hornsare designed and machined, and their resonance frequencies are measured. It is shownthat the measured frequencies are in good agreement with the computed ones, and themeasured frequencies for the longitudinal and torsional vibrations in the horn are also ingood agreement with each other. This kind of horns can be used in ultrasonic machining,drilling and fatigue testing which need very large displacement amplitudes. |
| DOI：10.11684/j.issn.1000-310X.1997.05.010 |
| 中文关键词: 纵向振动 扭转振动 同频共振 半径减缩系数 共振频率 |
| 英文关键词: simultaneousresonance of longitudinal and torsional vibrations radius decay coefficient resonance frequency |
| 基金项目:国家自然科学基金 |
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