关键词: 振动与波, 统计能量分析, 载荷识别, 间接耦合, 输入功率

Abstract: The paper investigates the load identification of a threeplate coupling system based on the statistical energy analysis theory. Firstly, the stable power injection method is employed to identify the inner loss factors and the coupling loss factors of substructures, in which the indirect coupling characteristics are considered. Based on the established power flow balance equation of the system, the identification of concentrated load is conducted. The results show that, in the highfrequency range, the identified input power agrees well with the measured input power. The work presented in the paper provides a theoretical reference for load identification of structures in the high frequency domain.

Key words: vibration and wave, statistical energy analysis, load identification, indirect coupling, input power