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1)  compound vibration
复合振动
1.
Effect of compound vibration on ovariectomized sprague-dawley rats:a random controlled osteoporosis prevention study;
复合振动预防去势大鼠骨质疏松的实验研究
2.
The effect of compound vibration on bone strength in ovariectomized SD rat osteoporosis models
复合振动对去势骨质疏松大鼠骨强度的作用
3.
For further promotion,effect of techniques are stated above,compound vibration stimulation technique,namely compound vibration-chemical de-plugging and compound hydraulic vibration augmented injection,etc are developed now.
为了进一步提高这些技术的作用效果,开展了复合振动增产、增注技术的研究,即,振动-化学复合解堵技术、振动-注水复合增注技术等。
2)  multi frequency vibration
多阶复合振动
3)  longitudinal flexural complex vibration mode
纵-弯复合振动
4)  composite vibrational mode
复合振动模式
5)  longitudinal-flexural composite vibrations
纵弯复合振动
6)  double random vibration
复合随机振动
1.
A new dynamic reliability assessment method for double random vibration systems is proposed, in which the randomness involved in the structural parameters and excitation is taken into account.
建议了一类新的复合随机振动系统动力可靠度分析方法。
2.
Based upon the pseudo-excitetion method, the complicated double random vibration problem of the MDOF structure is at first transformed to a set recurrence determinate vibration equations in frequency domain of the MDOF structure under the excitation of a harmonic loading.
首先,基于虚拟激励法原理,把多自由度结构体系的复合随机振动方程转化为多自由度确定性结构体系复频反应的递推求解方程。
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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