Abstract: In the process of large and complex structural design, the synthesis and correction method have been widely used in modern structural, because substructure has the characteristics of fast, dynamic and comprehensive. In order to improve the synthesis and correction of substructure and attract domestic scholars to focus on the research of this technology, the methods for the comprehensive correction of vibration substructures and systems are introduced. In the synthesis method of substructure, the principle and application of these methods are compared. These methods include modal reduction and synthesis, JETMUNDSEN, REN, mechanical impedance admittance method synthesis method, frequency response function singular value decomposition and noise reduction method, angle of freedom and flexible equivalent and transformation method, the advantages and disadvantages of these methods are discussed, and the unsolved problems are discussed as well. In the method of substructure correction, the application effects of these methods are compared, including reference datum correction method, objective function correction method, parameter type method, neural network, sensitivity correction and frequency response function correction method. Finally, some problems existing in the model correction method are summarized, and further research is pointed out.

Key words: substructure, rotational degree of freedom, model updating, frequency response function