消除附加结构参数对动态响应影响的小秩矩阵法

A method of matrix of small rank for removing influence of additional structural parameters from dynamic response

建立了一种在实验模态分析中消除附加质量、阻尼和刚度对结构动态响应影响的小秩修正矩阵法. 该方法利用小秩修正矩阵,将测试时产生的附加质量、阻尼和刚度矩阵(小秩稀疏矩阵)用小秩修正矩阵法分解表示,推导出原振动系统的传递函数矩阵,进而给出原结构的动态响应.

A method of revise matrix of small rank for removing influence of additional mass, damping, and stiffness from dynamic response of structures is established. The method uses revise matrix of small rank to express additional mass, damping, and stiffness matrices produced by experiment. The transfer functions matrix of old vibration system is built and then the dynamic response of old structures is given.