double-frequency vibration

基本解释

The vibration natural frequency of aluminum alloy double-layer cable dome is analyzed and several factors of the reticulated shell are considered as well.
分析了肋环型铝合金双层球面网壳结构的自振特性，考虑了结构多种参数的影响，并且与同种结构形式的钢网壳进行了对比。
The phenomenon of beats can be observed directly on the double-channel oscillograph and the frequency of alternating current can be measured by the vibration curve of the beats.
在双通道示波器上可直观地观测拍现象，并利用拍振动曲线测量交流电的频率。
The synthesis of under-damping vibrations with the same frequency at two mutual vertical directions is studied and investigated using Model JGYW-2 double-single vibration apparatus.
利用JGYW 2型双单摆振动示波装置对两个相互垂直方向的同频率欠阻尼振动的合成进行了实验研究和理论分析，得到了欠阻尼振动合成的部分图形和表达式。