| 动圈－橡胶结构振动特性的实验研究 |
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| 引用本文： | 许伟,曾新吾,孙海洋,龚昌超.动圈－橡胶结构振动特性的实验研究[J].噪声与振动控制,2011,31(3):15-18. |
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| 作者姓名： | 许伟 曾新吾 孙海洋 龚昌超 |
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| 作者单位： | （ 1. 国防科技大学 理学院， 长沙 410073； 2. 国防科技大学 光电科学与工程学院， 长沙 410073 ） |
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| 摘 要： | 针对调制气流声源中动圈－橡胶结构振动系统，利用电涡流传感器构建振动位移测量实验平台，对橡胶硬度分别为40 o和50 o的系统振动特性进行相关研究。结果表明，该系统在恒流激励下可近似为单自由度系统；在小变形范围内，主共振频率上升梯度随预压量的增大而减小；50 o橡胶对应的系统有效频率范围优于40 o橡胶；激励信号的大小会改变橡胶的等效刚度，激励越大，刚度越小；在初始小变形工况下，增大橡胶预压量可改善位移谐波失真。
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| 关 键 词： | 振动与波 调制气流声源 动圈 橡胶 实验 |
| 收稿时间： | 2010-7-8 |
| 修稿时间： | 2010-9-26 |
Experimental Research on the Vibration Characteristics of Moving Coil - rubber Structure |
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| XU Wei,ZENG Xin-wu,SUN Hai-yang,GONG Chang-chao.Experimental Research on the Vibration Characteristics of Moving Coil - rubber Structure[J].Noise and Vibration Control,2011,31(3):15-18. |
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| Authors: | XU Wei ZENG Xin-wu SUN Hai-yang GONG Chang-chao |
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| Affiliation: | ( 1. Institute of Science, National University of Defense Technology; 2. Institute of Optical-electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China ) |
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| Abstract: | A measurement system for vibration displacement of the moving coil-rubber structure was set up using eddy current sensors technique.The vibration characteristics of system using rubber with Shore A hardness of 40 and 50(40oand 50o)were studied respectively.The results show that the moving coil-rubber system can be considered as a single-degree-of-freedom system.For small distortion,the main resonance frequency rising gradient decreases with the pre-compression increasing.The effective band width of the syst... |
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| Keywords: | vibration and wave air-modulated sound source moving coil rubber experiment |
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