共振与天然频率
共振和固有频率是在主题波和振动下讨论的两个非常重要的主题。它在巡回理论，灾难管理，工程甚至生命科学等领域也起着至关重要的作用。本文将尝试讨论这两种现象，它们的意义，相似之处以及最终的差异。
固有频率
每个系统都有一个称为固有频率的属性。系统的固有频率非常重要。如果为系统提供了较小的振荡，则系统将遵循系统的频率。地震和风等事件可能会破坏与事件本身相同的固有频率的物体。了解和测量系统的固有频率以保护其免受这种自然灾害的影响非常重要。固有频率与共振直接相关。稍后将进行解释。建筑物，电子和电路，光学系统，声音系统甚至生物系统等系统具有固有频率。它们可以取决于系统的阻抗，振荡或叠加的形式。
谐振
当一个系统（例如：摆）被给出一个小振荡时，它将开始摆动。它摆动的频率是系统的固有频率。现在想象一下应用于系统的期刊外力。这种外力的频率不一定与系统的固有频率相似。该力将试图将系统振荡到力的频率。这会产生不平衡的模式。系统吸收了来自外力的一些能量。现在让我们考虑频率相同的情况。在这种情况下，摆锤将随着外力吸收的最大能量自由摆动。这称为共振。 In this case, even if the pendulum and the force were not at the same phase, the pendulum would eventually adapt to the phase of the force. This is a forced oscillation. Since the pendulum absorbs highest amount of energy at resonance, the amplitude of the pendulum is a maximum at resonance. This is the danger the earthquakes and storms bring. Suppose the natural frequency of a building is the same as that of the earthquake, the building will swing with the highest amplitude eventually collapsing. There is also a resonance state in LCR circuits. The impedance of any LCR combination depends on the frequency of the alternative current. The resonance takes place at the minimum impedance. The frequency corresponding to the minimum frequency is the resonance frequency. At the highest impedance, the system is said to be anti-resonant. This resonance and anti-resonance is widely used in tuning circuits and filter circuits respectively.
共振和固有频率有什么区别？ •固有频率是系统的属性。 •共振是当系统提供具有固有频率的外部周期力时发生的事件。 •可以计算系统的固有频率。 •提供的力的幅度决定了共振的幅度。 |
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