Finite element analysis (FEA) is a computational method used to analyze complex structures and systems by dividing them into smaller, simpler elements. These elements are connected at nodes and the behavior of the entire system is then determined by solving systems of equations derived from the physical laws governing the system. FEA is widely used in engineering and physics to analyze the strength, stiffness, and performance of structures under different conditions such as loads, vibrations, and heat transfer. It can also be used to optimize designs, predict failures, and simulate real-world conditions. Overall, FEA allows engineers and researchers to accurately predict the behavior of complex systems without the need for physical prototyping, which can save time and money in the design process.