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1)  characteristic oscillation
特征振动,特征振荡,特性振动
2)  vibration characteristics
振动特征
1.
This paper,combining with the cases of typical rubbings occurring in the three350MW and600MW units during start-up and normal running at working speed in the recent years,briefs the fault conditions,vibration characteristics,analysis and diagnosis process and on-site emergency trouble-shooting method.
结合近年3台350~600MW机组在启动和工作转速时发生的典型动静碰磨,介绍故障简况、振动特征、分析判断过程和现场应急处理方法,为碰磨故障的准确分析、诊断和认定及现场采取的紧急处理措施提供参考。
3)  vibration characteristic
振动特征
1.
The trend of vibration characteristic with diesel engine working time was analyzed according to 350 h~600 h examination data which were acquired by overall monitoring and recording the vibration of a certain diesel engine which was in the bench test.
通过对某型号柴油机台架考核试验进行全程振动监测记录,以考核期350 h~600 h数据为基础,分析了振动特征随柴油机使用时间的变化趋势。
2.
The paper, first of all, gives a comprehensive description of the vibration characteristic of rotary machine frame-type foundation.
首先对旋转式机器和框架式基础的振动特征进行了综合描述,并在此基础上就框架式基础动力特性的鉴定标准及优化,综述了作者的观点,进一步阐述了“动规第五章”的基本思路。
4)  vibration signature
振动特征
1.
The results of feature extraction indicate that the time-frequency analysis method is fit for the analysis of time-varying micro-Doppler signal,and the vibration signature of the moving target can be effectively extracted.
特征提取的结果表明:时-频分析方法适合于时变微多普勒信号的分析,能够有效地提取出运动目标的振动特征。
5)  characteristic vibration
特征振动
6)  oscillatory characteristic
振荡特征
补充资料:点振子振动和点电极振子振动
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性质:又称点振子振动和点电极振子振动。振动能量绝大部分集中在点电极范围内,形成“能量封闭”的振动模式。振子电极面远小于压电陶瓷片的总面积,且与厚度有适宜的匹配关系。在交变电场作用下,沿厚度方向产生振动,其振幅随着至电极中心距离的增加,呈指数式衰减。谐振频率与压电陶瓷片的厚度有关。为提高频率通常将压电陶瓷片磨得很薄,有时考虑到压电陶瓷自身强度太低,可用特制的陶瓷片作垫片来防止压电陶瓷片损坏。常用于高频场合。

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