当导体的固有振动频率=30~160HZ时,需在电动力算式中引入______1的共振系数β。

当导体的固有振动频率=30~160HZ时,需在电动力算式中引入______1的共振系数β。


相关考题:

转子旋转时,当干扰的作用频率与转子的固有频率()时,将产生剧烈的振动,即共振现象。

受迫振动中,当驱动力的频率接近系统的固有角频率时,受迫振动振幅急剧增大的现象,称为__________。

29、受迫振动是在周期性外力(策动力)作用下的振动,稳态时的振动频率等于系统固有频率的频率,共振是指当周期性外力的频率趋近系统固有频率时所发生的现象。

1、阻尼对受迫振动起到抑制作用。当阻尼很小时,共振频率接近于固有频率。当阻尼为零时,共振频率等于固有频率,此时振幅趋近于无穷大。

当固有频率和驱动力频率相等时才会发生共振。

66、在鱼洗实验中,下列哪个说法是正确的? In the fish washing experiment, which of the following statements is true?A.当鱼洗器壁的振动频率越来越接近于鱼洗固有频率时,产生共振现象; Resonance phenomenon occurs when the vibration frequency of the wall of the fish washer is closer and closer to the natural frequency of the fish washer;###SXB###B.当鱼洗器壁的振动频率大于鱼洗固有频率时,产生共振现象; Resonance phenomenon occurs when the vibration frequency of the wall of the fish washer is greater than the natural frequency of the fish washer;###SXB###C.当鱼洗器壁的振动频率小于鱼洗固有频率时,产生共振现象; When the vibration frequency of the fish

受迫振动是在周期性外力(策动力)作用下的振动,稳态时的振动频率等于系统固有频率的频率,共振是指当周期性外力的频率趋近系统固有频率时所发生的现象。

阻尼对受迫振动起到抑制作用。当阻尼很小时,共振频率接近于固有频率。当阻尼为零时,共振频率等于固有频率,此时振幅趋近于无穷大。

在鱼洗实验中,下列哪个说法是正确的? In the fish washing experiment, which of the following statements is true?A.当鱼洗器壁的振动频率越来越接近于鱼洗固有频率时,产生共振现象; Resonance phenomenon occurs when the vibration frequency of the wall of the fish washer is closer and closer to the natural frequency of the fish washer;#B.当鱼洗器壁的振动频率大于鱼洗固有频率时,产生共振现象; Resonance phenomenon occurs when the vibration frequency of the wall of the fish washer is greater than the natural frequency of the fish washer;#C.当鱼洗器壁的振动频率小于鱼洗固有频率时,产生共振现象; When the vibration frequency of the fish