Modal Frequencies

Modal frequencies are the natural vibration rates at which a structure or object tends to oscillate when disturbed. Think of a guitar string that vibrates at specific pitches when plucked; similarly, structures like bridges or buildings have their own characteristic frequencies. When external forces, like wind or traffic, match these frequencies, they can cause resonance, amplifying vibrations and potentially leading to damage. Understanding modal frequencies helps engineers design structures to avoid such resonance, ensuring safety and stability by predicting how and when they might vibrate under various conditions.