What is harmonic analysis,modal analysis,Fem

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Accepted Answer

Harmonic analysis, modal analysis, and FEM are all methods used in engineering to analyze the behavior of structures and systems.

Harmonic analysis is used to study the response of a system to harmonic excitation, such as vibrations.
Modal analysis is used to determine the natural frequencies and mode shapes of a structure, which can be used to predict its response to external forces.
FEM (Finite Element Method) is a numerical technique used to solve complex engineering problems by dividing the system into smaller, simpler elements.
All three methods are commonly used in the design and analysis of mechanical, aerospace, and civil engineering systems.