Modeling and Stochastic Model Updating of Bolt-Jointed Structure

Table 6

Experimental and updated results of overall structure.

Mode shape	Experimental frequencies (Hz)		Experimental modal damping (%)		Updated frequencies (Hz)		Updated modal damping (%)
	Mean	SD	Mean	SD	Mean	SD	Mean	SD
First bending	15.70	0.160	0.1318	0.0194	15.74	0.178	0.1533	0.0153
Second bending	45.35	0.457	0.3311	0.0548	45.76	0.517	0.3299	0.0384
Third bending	80.08	1.033	0.4418	0.1295	81.48	0.944	0.5985	0.1004
Forth bending	141.08	1.213	0.1660	0.0303	140.69	1.552	0.1738	0.0267
Second torsion	148.48	1.996	0.5461	0.0829	148.71	1.676	0.5827	0.0708
Fifth bending	211.38	1.742	0.0828	0.0250	213.32	2.369	0.1012	0.0197