Experimental Characterization of Damped CFRP Materials with an Application to a Lightweight Car Door

Table 2

Natural frequencies, damping ratios, and MAC values for the leaf spring.

Mode number	(Hz)	(Hz)	(%)	(%)	Diag. (MAC)
1	67.80	71.3	−4.9	0.34	0.98
2	188.4	194.7	−3.2	0.21	0.97
3	238.3	241.4	−1.3	0.32	0.97
4	370.8	375.4	−1.2	0.20	0.96
5	452.4	442.0	2.6	0.34	0.96
6	614.6	614.4	0.0	0.21	0.95
7	748.8	720.2	4.0	0.38	0.93
8	828.3	851.6	−2.7	0.29	0.84
9	919.8	897.4	2.5	0.30	0.91
10	1053.9	994.5	6.0	0.49	0.87