Harmonic response analysis is used to simulate how a structure will respond to sinusoidally repeating dynamic loading. This type of loading occurs in many structures you may encounter daily, such as an electric toothbrush or a fan inside a laptop. This course will introduce the concepts and explain a special technique to solve such harmonic loading in an efficient manner. We also discuss related concepts such as natural frequencies and resonance as well as how harmonic loads affect the system. The proper interpretation of harmonic response results is critical, so we also discuss the methods required to evaluate results.