Seismic Test and Simulation of Spring Vibration Isolated Foundation for Turbo-Generator

Table 5

Contrast of natural frequencies (Hz).

Mode shape characteristics		Test	Numerical simulation
			SeismoStruct	STARDYNE
				Top deck	TG deck and substructure
Transverse translation		0.92	1.06 (15%)	1.06 (15%)	1.04 (13%)
Longitudinal translation		1.01	1.15 (14%)	1.12 (11%)	1.09 (8%)
Translation torsion		1.23	1.34 (9%)	1.37 (11%)	1.34 (9%)
Vertical bending		3.48	3.26 (−6%)	3.26 (−6%)	3.25 (−7%)
Vertical swing	Transverse	3.57	2.77 (−22%)	3.04 (−15%)	3.04 (−15%)
	Longitudinal	\	3.07 (\)	4.34 (\)	4.47 (\)

Note. In parentheses, the percentage of deviation between numerical model and test results is given.