Dynamic Reliability Evaluation on Foundation of Stone Cutting Machine under Ambient Excitation

Table 3

The results for system of the identified frequencies and the theoretical frequencies.

Input noise (%)	Modal	Identified frequency (Hz)	Theory frequency (Hz)	Error (%)	Identified damping ratio	Empirical damping ratio
0	1	46.511	47.591	2.269	0.0120	0.010
	2	99.975	105.013	4.797	0.0395	0.050
60	1	49.032	47.591	3.027	0.008	0.010
	2	108.281	105.013	3.112	0.0355	0.050