The Influence on Modal Parameters of Thin Cylindrical Shell under Bolt Looseness Boundary

Table 8

Damping ratios of TCS under BLB with different looseness numbers.

Modal; order	No looseness; (%)	Loosen; 1 bolt; (%)	Effect degree; ( (%)	Loosen; 2 bolts; (%)	Effect degree; (%)	Loosen; 3 bolts; (%)	Effect degree; (; (%)	Loosen; 4 bolts; (%)	Effect degree; (; (%)
1	0.20	0.13		0.12		0.18		0.19
2	0.76	0.37		0.35		0.31		0.34
3	1.14	0.53		0.69		0.76		0.41
4	0.27	0.89		0.81		0.82		0.85
5	0.74	1.23		0.99		1.40		1.36
6	0.37	0.22		0.24		0.85		0.91
7	0.39	0.33		0.11		0.15		0.17
8	0.30	0.28		0.21		0.21		0.15