A method is introduced to identify the local modal parameter of large complex structure, which update a finite element model to match experimental model analysis data. Using a model simplification technique in the parameter identification process, it is computational efficient and requires less storage space, which simplifies the product development cycle and bring down the design cost. Another key technique in this paper is the intelligent genetic algorithm, which include some strategies to improve search effect and efficiency. To show the identification process more clearly and vividly, all the identification techniques are discussed based on the local modal parameter identification of excavator working equipment. The result of the illustration shows the identification process is feasible and efficient, and the intelligent Gas is powerful.
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