Finally , floquet ' s theory is used to generate - dynamic stability system equations for the purpose of determining both undamped and damped instability regions 最后采用floquet理论求得考虑阻尼及不考虑阻尼时确定动力失稳区间的控制方程。
In contrast to phase separation ( curve - fitting ) approaches which are largely mathematical , phase resonance testing is a physical technique . when a structure is vibrating in a normal mode , the undamped natural frequency and normal - mode shap of the structure are directly measured . in the classic phase resonance testing , the test data processing is simpler and the results are more accuracy 相对于相位分离法来说,相位共振法是一种比较直观的物理识别方法,在结构做“纯模态”振动时,通过物理测量直接获得模态参数;试验数据处理工作量小,且精度一般比单输入系统高。
