A concept of global frequency response function(GFRF) has been presented. The MIMO modal parameter identification modal has been established,based on the weighting sum of modal shape squares.

• 提出了整体频响函数的新概念（GFRF）．以振型平方和的形式对全部频响函数进行加权组合，建立了多输入多输出模态参数的识别模型。